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A landmark book on the influential many-worlds interpretation of quantum mechanicsIn 1957, Hugh Everett proposed a novel interpretation of quantum mechanics-a view that eventually became known as the many-worlds interpretation. This book presents Everett's two landmark papers on the idea-"'Relative State' Formulation of Quantum Mechanics" and "The Theory of the Universal Wave Function"-as well as further discussion of the idea in papers from a number of other physicists: J. A. Wheeler, Bryce DeWitt, L. N. Cooper and D. Van Vechten, and Neill Graham. In his interpretation, Everett denies the existence of a separate classical realm and asserts the propriety of considering a state vector for the whole universe. Because this state vector never collapses, reality as a whole is rigorously deterministic. This reality, which is described jointly by the dynamical variables and the state vector, isn't the reality customarily perceived; rather, it's a reality composed of many worlds. By virtue of the temporal development of the dynamical variables, the state vector decomposes naturally into orthogonal vectors, reflecting a continual splitting of the universe into a multitude of mutually unobservable but equally real worlds, in each of which every good measurement has yielded a definite result, and in most of which the familiar statistical quantum laws hold. Bryce S. DeWitt (1923-2004) was a prize-winning theoretical physicist and professor emeritus of physics at the University of Texas at Austin. Neill Graham (1941-2015) was a physicist and writer.

A landmark book on the influential many-worlds interpretation of quantum mechanicsIn 1957, Hugh Everett proposed a novel interpretation of quantum mechanics-a view that eventually became known as the many-worlds interpretation. This book presents Everett's two landmark papers on the idea-"'Relative State' Formulation of Quantum Mechanics" and "The Theory of the Universal Wave Function"-as well as further discussion of the idea in papers from a number of other physicists: J. A. Wheeler, Bryce DeWitt, L. N. Cooper and D. Van Vechten, and Neill Graham. In his interpretation, Everett denies the existence of a separate classical realm and asserts the propriety of considering a state vector for the whole universe. Because this state vector never collapses, reality as a whole is rigorously deterministic. This reality, which is described jointly by the dynamical variables and the state vector, isn't the reality customarily perceived; rather, it's a reality composed of many worlds. By virtue of the temporal development of the dynamical variables, the state vector decomposes naturally into orthogonal vectors, reflecting a continual splitting of the universe into a multitude of mutually unobservable but equally real worlds, in each of which every good measurement has yielded a definite result, and in most of which the familiar statistical quantum laws hold. Bryce S. DeWitt (1923-2004) was a prize-winning theoretical physicist and professor emeritus of physics at the University of Texas at Austin. Neill Graham (1941-2015) was a physicist and writer.

Volume two of the acclaimed three-volume series on modern Japanese colonialism and imperialismThis book brings together essays by leading experts on the history of Japan to examine the period from 1895 to 1937 when Japan’s economic, social, political, and military influence in China expanded so rapidly that it supplanted the influence of competing Western powers. They discuss how Japan’s informal empire emerged in China after Japan entered the Treaty Port system in 1895 and how it shaped Japan’s own internal development. How did Japan’s informal empire expand in size and importance so that Japanese economic and security interests became heavily dependent on China? What influence did Japanese business groups, China experts, and military have on their government’s China policy? How did the Japanese in China deal with the threatening rise of Chinese nationalism? Exploring these and other questions, these essays show how the pursuit of an informal empire in China played a profound role in the emergence of modern Japan. The contributors are Banno Junji, Barbara J. Brooks, Alvin D. Coox, Peter Duus, Albert Feuerwerker, Kitaoka Shin’ichi, Sophia Lee, Mizoguchi Toshiyuki, Ramon H. Myers, Nakagane Katsuji, Mark R. Peattie, Douglas R. Reynolds, and William D. Wray.This is the second volume of a series on modern Japanese colonialism and imperialism. Volume one is The Japanese Colonial Empire, 1895–1945. Volume three is The Japanese Wartime Empire, 1931–1945.

Volume two of the acclaimed three-volume series on modern Japanese colonialism and imperialismThis book brings together essays by leading experts on the history of Japan to examine the period from 1895 to 1937 when Japan's economic, social, political, and military influence in China expanded so rapidly that it supplanted the influence of competing Western powers. They discuss how Japan's informal empire emerged in China after Japan entered the Treaty Port system in 1895 and how it shaped Japan's own internal development. How did Japan's informal empire expand in size and importance so that Japanese economic and security interests became heavily dependent on China? What influence did Japanese business groups, China experts, and military have on their government's China policy? How did the Japanese in China deal with the threatening rise of Chinese nationalism? Exploring these and other questions, these essays show how the pursuit of an informal empire in China played a profound role in the emergence of modern Japan. The contributors are Banno Junji, Barbara J. Brooks, Alvin D. Coox, Peter Duus, Albert Feuerwerker, Kitaoka Shin'ichi, Sophia Lee, Mizoguchi Toshiyuki, Ramon H. Myers, Nakagane Katsuji, Mark R. Peattie, Douglas R. Reynolds, and William D. Wray. This is the second volume of a series on modern Japanese colonialism and imperialism. Volume one is The Japanese Colonial Empire, 1895-1945. Volume three is The Japanese Wartime Empire, 1931-1945.

In 1958, an African-American handyman named Jimmy Wilson was sentenced to die in Alabama for stealing two dollars. Shocking as this sentence was, it was overturned only after intense international attention and the interference of an embarrassed John Foster Dulles. Soon after the United States' segregated military defeated a racist regime in World War II, American racism was a major concern of U.S. allies, a chief Soviet propaganda theme, and an obstacle to American Cold War goals throughout Africa, Asia, and Latin America. Each lynching harmed foreign relations, and "e;the Negro problem"e; became a central issue in every administration from Truman to Johnson. In what may be the best analysis of how international relations affected any domestic issue, Mary Dudziak interprets postwar civil rights as a Cold War feature. She argues that the Cold War helped facilitate key social reforms, including desegregation. Civil rights activists gained tremendous advantage as the government sought to polish its international image. But improving the nation's reputation did not always require real change. This focus on image rather than substance--combined with constraints on McCarthy-era political activism and the triumph of law-and-order rhetoric--limited the nature and extent of progress. Archival information, much of it newly available, supports Dudziak's argument that civil rights was Cold War policy. But the story is also one of people: an African-American veteran of World War II lynched in Georgia; an attorney general flooded by civil rights petitions from abroad; the teenagers who desegregated Little Rock's Central High; African diplomats denied restaurant service; black artists living in Europe and supporting the civil rights movement from overseas; conservative politicians viewing desegregation as a communist plot; and civil rights leaders who saw their struggle eclipsed by Vietnam. Never before has any scholar so directly connected civil rights and the Cold War. Contributing mightily to our understanding of both, Dudziak advances--in clear and lively prose--a new wave of scholarship that corrects isolationist tendencies in American history by applying an international perspective to domestic affairs. In her new preface, Dudziak discusses the way the Cold War figures into civil rights history, and details this book's origins, as one question about civil rights could not be answered without broadening her research from domestic to international influences on American history.

One of the most important mathematical achievements of the past several decades has been A. Grothendieck's work on algebraic geometry. In the early 1960s, he and M. Artin introduced etale cohomology in order to extend the methods of sheaf-theoretic cohomology from complex varieties to more general schemes. This work found many applications, not only in algebraic geometry, but also in several different branches of number theory and in the representation theory of finite and p-adic groups. Yet until now, the work has been available only in the original massive and difficult papers. In order to provide an accessible introduction to etale cohomology, J. S. Milne offers this more elementary account covering the essential features of the theory. The author begins with a review of the basic properties of flat and etale morphisms and of the algebraic fundamental group. The next two chapters concern the basic theory of etale sheaves and elementary etale cohomology, and are followed by an application of the cohomology to the study of the Brauer group. After a detailed analysis of the cohomology of curves and surfaces, Professor Milne proves the fundamental theorems in etale cohomology -- those of base change, purity, Poincare duality, and the Lefschetz trace formula. He then applies these theorems to show the rationality of some very general L-series.Originally published in 1980.The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

An authoritative treatment of the diverse and beautiful anole lizards of mainland Central and South AmericaAnoles are highly visible and aesthetically pleasing lizards that are abundant throughout Central and South America. The subjects of countless evolutionary and ecological studies that have advanced our understanding of basic principles in biology, these colorful reptiles are notoriously difficult to identify, and species names are often confusing and inconsistent. A Guide to the Anolis Lizards (Anoles) of Mainland Central and South America is the first book to enable the identification of all known species of anole in the region while establishing baseline knowledge for further research. Drawing on the latest findings, this comprehensive field companion and taxonomic reference is the ultimate guide to these extraordinary lizards. Provides the first stable taxonomy of mainland anoles while aiding field identification of these marvelous neotropical reptilesFeatures hundreds of stunning photos depicting most species, including several species never before photographedDescribes the key identification features and natural history of over 200 species of mainland anolesFacilitates scientific research on evolution, ecology, and species discoveryAn ideal travel companion for ecotourists and other visitors to Central and South AmericaAccompanied by an online identification key

A magisterial history of the Renaissance and the birth of the modern worldThe cultural epoch we know as the Renaissance emerged at a certain time and in a certain place. Why then and not earlier? Why there and not elsewhere? In The World at First Light, historian Bernd Roeck explores the cultural and historical preconditions that enabled the European Renaissance. Roeck shows that the rediscovery of ancient knowledge, including the science of the medieval Arab world, played a critical role in shaping the beginnings of Western modernity. He explains that the Renaissance emerged in a part of Europe where competing states and cities formed relatively open societies. Most of the era's creative minds-from Leonardo de Vinci and Michelangelo to Copernicus and Galileo-came from the middle classes. The art of arguing flowered, the basso continuo to intellectual and cultural breakthroughs. Roeck argues that two revolutions shaped the Renaissance: a media revolution, triggered by Gutenberg's invention of movable type-which itself was a driving force behind the scientific revolution and the advent of modern science. He also reports on the dark side of the era-hatred of Jews, witch panic, religious wars, and the atrocities of colonialism. In a series of meditative counterfactuals, Roeck considers other cultural rebirths throughout the first millennium, from the Islamic empire to the Carolingians, examining why the epic developments of the Renaissance took place in the West and not elsewhere. The complicated legacy of the Renaissance, he shows, encompasses the art of critical thinking as learned from the ancients, the emergence of the modern state, and the genesis of democracy.

A richly illustrated look at the intersection of art and science in Renaissance EuropeArt played a pivotal role in the development of natural history during the sixteenth and seventeenth centuries. European colonial expansion enabled naturalists to study previously unknown insects, animals, and other beestjes-"little beasts"-from around the globe. Little Beasts explores how artists such as Joris Hoefnagel and Jan van Kessel helped deepen and spread knowledge of these creatures with highly detailed and playful works that inspired generations of printmakers, painters, decorative artists, and naturalists. This appealing book begins by mapping the origins of natural history as a discipline, showing how early illustrated treatises reflected a vibrant exchange between artists and naturalists that contributed to the growth of natural science and sparked public fascination with the animal kingdom. It shares insights into Hoefnagel's engagement with contemporary natural history, as demonstrated in his Four Elements-a four-volume series of some three hundred watercolor miniatures of animals-and examines how intaglio printmaking enabled natural history studies to reach new audiences. The volume concludes with a discussion of Van Kessel's small oil paintings, likely made for discerning collectors of both natural and artistic curiosities. Blending lively and informative essays with beautiful illustrations, Little Beasts traces the connections between artists, naturalists, and collectors in an age of scientific discovery and broadening horizons, inviting readers to look with wonder at nature's variety. Published in association with the National Gallery of Art, Washington, DCExhibition ScheduleNational Gallery of Art, Washington, DCMay 18-November 2, 2025

"e;We have many poets of the First Book,"e; the poet and critic Louis Simpson remarked in 1957, describing a sense that the debut poetry collection not only launched the contemporary poetic career but also had come to define it. Surveying American poetry over the past hundred years, The First Book explores the emergence of the poetic debut as a unique literary production with its own tradition, conventions, and dynamic role in the literary market. Through new readings of poets ranging from Wallace Stevens and Marianne Moore to John Ashbery and Louise Gluck, Jesse Zuba illuminates the importance of the first book in twentieth-century American literary culture, which involved complex struggles for legitimacy on the part of poets, critics, and publishers alike. Zuba investigates poets' diverse responses to the question of how to launch a career in an increasingly professionalized literary scene that threatened the authenticity of the poetic calling. He shows how modernist debuts evoke markedly idiosyncratic paths, while postwar first books evoke trajectories that balance professional imperatives with traditional literary ideals. Debut titles ranging from Simpson's The Arrivistes to Ken Chen's Juvenilia stress the strikingly pervasive theme of beginning, accommodating a new demand for career development even as it distances the poets from that demand.Combining literary analysis with cultural history, The First Book will interest scholars and students of twentieth-century literature as well as readers and writers of poetry.

What we can learn about caregiving and community from the Victorian novelIn Communities of Care, Talia Schaffer explores Victorian fictional representations of care communities, small voluntary groups that coalesce around someone in need. Drawing lessons from Victorian sociality, Schaffer proposes a theory of communal care and a mode of critical reading centered on an ethics of care.In the Victorian era, medical science offered little hope for cure of illness or disability, and chronic invalidism and lengthy convalescences were common. Small communities might gather around afflicted individuals to minister to their needs and palliate their suffering. Communities of Care examines these groups in the novels of Jane Austen, Charlotte Bronte, Charles Dickens, George Eliot, Henry James, and Charlotte Yonge, and studies the relationships that they exemplify. How do carers become part of the community? How do they negotiate status? How do caring emotions develop? And what does it mean to think of care as an activity rather than a feeling? Contrasting the Victorian emphasis on community and social structure with modern individualism and interiority, Schaffer's sympathetic readings draw us closer to the worldview from which these novels emerged. Schaffer also considers the ways in which these models of carework could inform and improve practice in criticism, in teaching, and in our daily lives.Through the lens of care, Schaffer discovers a vital form of communal relationship in the Victorian novel. Communities of Care also demonstrates that literary criticism done well is the best care that scholars can give to texts.

The virulent new brand of Islamic extremism threatening the WestIn November 2015, ISIS terrorists massacred scores of people in Paris with coordinated attacks on the Bataclan concert hall, cafes and restaurants, and the national sports stadium. On Bastille Day in 2016, an ISIS sympathizer drove a truck into crowds of vacationers at the beaches of Nice, and two weeks later an elderly French priest was murdered during morning Mass by two ISIS militants. Here is Gilles Kepel's explosive account of the radicalization of a segment of Muslim youth that led to those attacks-and of the failure of governments in France and across Europe to address it. It is a book everyone in the West must read.Terror in France shows how these atrocities represent a paroxysm of violence that has long been building. The turning point was in 2005, when the worst riots in modern French history erupted in the poor, largely Muslim suburbs of Paris after the accidental deaths of two boys who had been running from the police. The unrest-or "e;French intifada"e;-crystallized a new consciousness among young French Muslims. Some have fallen prey to the allure of "e;war of civilizations"e; rhetoric in ways never imagined by their parents and grandparents.This is the highly anticipated English edition of Kepel's sensational French bestseller, first published shortly after the Paris attacks. Now fully updated to reflect the latest developments and featuring a new introduction by the author, Terror in France reveals the truth about a virulent new wave of jihadism that has Europe as its main target. Its aim is to divide European societies from within by instilling fear, provoking backlash, and achieving the ISIS dream-shared by Europe's Far Right-of separating Europe's growing Muslim minority community from the rest of its citizens.

An interdisciplinary history of trigonometry from the mid-sixteenth century to the early twentiethThe Doctrine of Triangles offers an interdisciplinary history of trigonometry that spans four centuries, starting in 1550 and concluding in the 1900s. Glen Van Brummelen tells the story of trigonometry as it evolved from an instrument for understanding the heavens to a practical tool, used in fields such as surveying and navigation. In Europe, China, and America, trigonometry aided and was itself transformed by concurrent mathematical revolutions, as well as the rise of science and technology.Following its uses in mid-sixteenth-century Europe as the "e;foot of the ladder to the stars"e; and the mathematical helpmate of astronomy, trigonometry became a ubiquitous tool for modeling various phenomena, including animal populations and sound waves. In the late sixteenth century, trigonometry increasingly entered the physical world through the practical disciplines, and its societal reach expanded with the invention of logarithms. Calculus shifted mathematical reasoning from geometric to algebraic patterns of thought, and trigonometry's participation in this new mathematical analysis grew, encouraging such innovations as complex numbers and non-Euclidean geometry. Meanwhile in China, trigonometry was evolving rapidly too, sometimes merging with indigenous forms of knowledge, and with Western discoveries. In the nineteenth century, trigonometry became even more integral to science and industry as a fundamental part of the science and engineering toolbox, and a staple subject in high school classrooms.A masterful combination of scholarly rigor and compelling narrative, The Doctrine of Triangles brings trigonometry's rich historical past full circle into the modern era.

A fascinating collection of questions and answers-about courtship, marriage, love, and sex-from a seventeenth-century periodical The Athenian Mercury-a one-page, two-sided periodical published in 1690s London-included the world's first personal advice column. Acclaimed historian and Pulitzer Prize finalist Mary Beth Norton's "I Humbly Beg Your Speedy Answer" is a remarkable collection of questions and answers drawn from this groundbreaking publication. In these exchanges, anonymous readers look for help with their most intimate romantic problems-about courting, picking a spouse, getting married, securing or avoiding parental consent, engaging in premarital sex and extramarital affairs, and much more. Spouses ask how to handle contentious marriages and tense relationships with in-laws. Some correspondents seek ways to ease a conscience troubled by romantic and sexual misbehavior. The lonely wonder how to meet a potential partner-or how to spark a warmer relationship with someone they already have an eye on. And both men and women inquire about how to extract themselves from relationships turned sour. Many of these concerns will be familiar to readers of today's advice columns. But others are delightfully strange and surprising, reflecting forgotten social and romantic customs and using charmingly unfamiliar language in which, for example, "kissing is a luscious diet," a marriage might provide "much love and moderate conveniency," and an "amorous disposition" can lead to trouble. Delightful and entertaining, "I Humbly Beg Your Speedy Answer" provides a unique, intriguing, and revealing picture of what has-and hasn't-changed over the past three centuries when it comes to love, sex, and relationships.

How to put democracy at the heart of AI governanceArtificial intelligence and machine learning are reshaping our world. Police forces use them to decide where to send police officers, judges to decide whom to release on bail, welfare agencies to decide which children are at risk of abuse, and Facebook and Google to rank content and distribute ads. In these spheres, and many others, powerful prediction tools are changing how decisions are made, narrowing opportunities for the exercise of judgment, empathy, and creativity. In Algorithms for the People, Josh Simons flips the narrative about how we govern these technologies. Instead of examining the impact of technology on democracy, he explores how to put democracy at the heart of AI governance.Drawing on his experience as a research fellow at Harvard University, a visiting research scientist on Facebook's Responsible AI team, and a policy advisor to the UK's Labour Party, Simons gets under the hood of predictive technologies, offering an accessible account of how they work, why they matter, and how to regulate the institutions that build and use them.He argues that prediction is political: human choices about how to design and use predictive tools shape their effects. Approaching predictive technologies through the lens of political theory casts new light on how democracies should govern political choices made outside the sphere of representative politics. Showing the connection between technology regulation and democratic reform, Simons argues that we must go beyond conventional theorizing of AI ethics to wrestle with fundamental moral and political questions about how the governance of technology can support the flourishing of democracy.

How Tocqueville's ideas can help us build resilient liberal democracies in a divided worldHow can today's liberal democracies withstand the illiberal wave sweeping the globe? What can revive our waning faith in constitutional democracy? Tocqueville's Dilemmas, and Ours argues that Alexis de Tocqueville, one of democracy's greatest champions and most incisive critics, can guide us forward.Drawing on Tocqueville's major works and lesser-known policy writings, Ewa Atanassow shines a bright light on the foundations of liberal democracy. She argues that its prospects depend on how we tackle three dilemmas that were as urgent in Tocqueville's day as they are in ours: how to institutionalize popular sovereignty, how to define nationhood, and how to grasp the possibility and limits of global governance. These are pivotal but often neglected dimensions of Tocqueville's work, and this fresh look at his writings provides a powerful framework for addressing the tensions between liberalism and democracy in the twenty-first century.Recovering a richer liberalism capable of weathering today's political storms, Tocqueville's Dilemmas, and Ours explains how we can reclaim nationalism as a liberal force and reimagine sovereignty in a global age-and do so with one of democracy's most discerning thinkers as our guide.

From one of today's most innovative ancient historians, a provocative new vision of why ancient history matters-and why it needs to be told in a radically different, global wayIt's easy to think that ancient history is, well, ancient history-obsolete, irrelevant, unjustifiably focused on Greece and Rome, and at risk of extinction. In What Is Ancient History?, Walter Scheidel presents a compelling case for a new kind of ancient history-a global history that captures antiquity's pivotal role as a decisive phase in human development, one that provided the shared foundation of our world and continues to shapes our lives today. For Scheidel, ancient history is when the earliest versions of today's ways of life were created and spread-from farming, mining, and engineering to housing and transportation, cities and government, writing and belief systems. Transforming the planet, this process unfolded all over the world, in Eurasia, Africa, and the Americas, often at different times, sometimes haltingly but ultimately unstoppably. Yet it's rarely studied or taught that way. Since the eighteenth century, Western intellectuals have dismembered the ancient world, driven not only by their quest for professional expertise but also by nationalism, colonialism, racism, and the idealization of Greece and Rome. Specialized scholarship has fractured into numerous academic niches, obscuring broader patterns and dynamics and keeping us from understanding just how much humanity has long had in common. The time has come, Scheidel argues, to put the ancient world back together-by moving beyond the limitations of Greco-Roman "classics," by systematically comparing ancient societies, and by exploring early exchanges and connections between them. The time has come, in other words, for an ancient history for everyone.

A dazzling new history of the Indian subcontinent and its diverse peoples in global context-from antiquity to todayMuch of world history is Indian history. Home today to one in four people, the subcontinent has long been densely populated and deeply connected to Asia, Africa, Europe, and the Americas through migration and trade. In this magisterial history, Audrey Truschke tells the fascinating story of the region historically known as India-which includes today's India, Pakistan, Bangladesh, and parts of Afghanistan-and the people who have lived there. A sweeping account of five millennia, from the dawn of the Indus Valley Civilization to the twenty-first century, this engaging and richly textured narrative chronicles the most important political, social, religious, intellectual, and cultural events. And throughout, it describes how the region has been continuously reshaped by its astonishing diversity, religious and political innovations, and social stratification. Here, readers will learn about Hinduism, Buddhism, Jainism, Islam, and Sikhism; the Vedas and Mahabharata; Ashoka and the Mauryan Empire; the Silk Road; the Cholas; Indo-Persian rule; the Mughal Empire; European colonialism; national independence movements; the 1947 Partition of India; the recent rise of Hindu nationalism; the challenges of climate change; and much more. Emphasizing the diversity of human experiences on the subcontinent, the book presents a wide range of voices, including those of women, religious minorities, lower classes, and other marginalized groups. You cannot understand India today without appreciating its deeply contested history, which continues to drive current events and controversies. A comprehensive and innovative book, India is essential reading for anyone who is interested in the past, present, or future of the subcontinent.

The surprising history of education technology and its political, financial and social impact on higher education and our world. From AI tutors who ensure individualized instruction but cannot do math to free online courses from elite universities that were supposed to democratize higher education, claims that technological innovations will transform education often fall short. Yet, as Anne Trumbore shows in The Teacher in the Machine, the promises of today's cutting-edge technologies aren't new. Long before the excitement about the disruptive potential of generative AI-powered tutors and massive open online courses, scholars at Stanford, MIT, and the University of Illinois in the 1960s and 1970s were encouraged by the US government to experiment with computers and artificial intelligence in education. Trumbore argues that the contrast between these two eras of educational technology reveal the changing role of higher education in the United States as it shifted from a public good to a private investment. Writing from a unique insider's perspective and drawing on interviews with key figures, historical research, and case studies, Trumbore traces today's disparate discussions about generative AI, student loan debt, and declining social trust in higher education back to their common origins at a handful of elite universities fifty years ago. Arguing that those early educational experiments have resonance today, Trumbore points the way to a more equitable and collaborative pedagogical future. Her account offers a critical lens on the history of technology in education just as universities and students seek a stronger hand in shaping the future of their institutions.

Presents a study of network flow problems. This title introduces the models and algorithms that can be used in the fields of transportation systems, manufacturing, inventory planning, image processing, and internet traffic. It is suitable for the researchers working with networks.