Godel


Book Description

Kurt Gödel was an intellectual giant. His Incompleteness Theorem turned not only mathematics but also the whole world of science and philosophy on its head. Shattering hopes that logic would, in the end, allow us a complete understanding of the universe, Gödel's theorem also raised many provocative questions: What are the limits of rational thought? Can we ever fully understand the machines we build? Or the inner workings of our own minds? How should mathematicians proceed in the absence of complete certainty about their results? Equally legendary were Gödel's eccentricities, his close friendship with Albert Einstein, and his paranoid fear of germs that eventually led to his death from self-starvation. Now, in the first book for a general audience on this strange and brilliant thinker, John Casti and Werner DePauli bring the legend to life.




Linear Algebra and Differential Equations


Book Description

The material presented in this book corresponds to a semester-long course, ``Linear Algebra and Differential Equations'', taught to sophomore students at UC Berkeley. In contrast with typical undergraduate texts, the book offers a unifying point of view on the subject, namely that linear algebra solves several clearly-posed classification problems about such geometric objects as quadratic forms and linear transformations. This attractive viewpoint on the classical theory agrees well with modern tendencies in advanced mathematics and is shared by many research mathematicians. However, the idea of classification seldom finds its way to basic programs in mathematics, and is usually unfamiliar to undergraduates. To meet the challenge, the book first guides the reader through the entire agenda of linear algebra in the elementary environment of two-dimensional geometry, and prior to spelling out the general idea and employing it in higher dimensions, shows how it works in applications such as linear ODE systems or stability of equilibria. Appropriate as a text for regular junior and honors sophomore level college classes, the book is accessible to high school students familiar with basic calculus, and can also be useful to engineering graduate students.




XXXXX


Book Description

xxxxx proposes a radical, new space for artistic exploration, with essential contributions from a diverse range of artists, theorists, and scientists. Combining intense background material, code listings, screenshots, new translation, [the] xxxxx [reader] functions as both guide and manifesto for a thought movement which is radically opposed to entropic contemporary economies. xxxxx traces a clear line across eccentric and wide ranging texts under the rubric of life coding which can well be contrasted with the death drive of cynical economy with roots in rationalism and enlightenment thought. Such philosophy, world as machine, informs its own deadly flipside embedded within language and technology. xxxxx totally unpicks this hiroshimic engraving, offering an dandyish alternative by way of deep examination of software and substance. Life coding is primarily active, subsuming deprecated psychogeography in favour of acute wonderland technology, wary of any assumed transparency. Texts such as Endonomadology, a text from celebrated biochemist and chaos theory pioneer Otto E. Roessler, who features heavily throughout this intense volume, make plain the sadistic nature and active legacy of rationalist thought. At the same time, through the science of endophysics, a physics from the inside elaborated here, a delicate theory of the world as interface is proposed. xxxxx is very much concerned with the joyful elaboration of a new real; software-led propositions which are active and constructive in eviscerating contemporary economic culture. xxxxx embeds Perl Routines to Manipulate London, by way of software artist and Mongrel Graham Harwood, a Universal Dovetailer in the Lisp language from AI researcher Bruno Marchal rewriting the universe as code, and self explanatory Pornographic Coding from plagiarist and author Stewart Home and code art guru Florian Cramer. Software is treated as magical, electromystical, contrasting with the tedious GUI desktop applications and user-led drudgery expressed within a vast ghost-authored literature which merely serves to rehearse again and again the demands of industry and economy. Key texts, which well explain the magic and sheer art of programming for the absolute beginner are published here. Software subjugation is made plain within the very title of media theorist Friedrich Kittler's essay Protected Mode, published in this volume. Media, technology and destruction are further elaborated across this work in texts such as War.pl, Media and Drugs in Pynchon's Second World War, again from Kittler, and Simon Ford's elegant take on J.G Ballard's crashed cars exhibition of 1970, A Psychopathic Hymn. Software and its expansion stand in obvious relation to language. Attacking transparency means examining the prison cell or virus of language; life coding as William Burrough's cutup. And perhaps the most substantial and thorough-going examination is put forward by daring Vienna actionist Oswald Wiener in his Notes on the Concept of the Bio-adapter which has been thankfully unearthed here. Equally, Olga Goriunova's extensive examination of a new Russian literary trend, the online male literature of udaff.com provides both a reexamination of culture and language, and an example of the diversity of xxxxx; a diversity well reflected in background texts ranging across subjects such as Leibniz' monadology, the ur-crash of supreme flaneur Thomas de Quincey and several rewritings of the forensic model of Jack the Ripper thanks to Stewart Home and Martin Howse. xxxxx liberates software from the machinic, and questions the transparency of language, proposing a new world view, a sheer electromysticism which is well explained with reference to the works of Thomas Pynchon in Friedrich Kittler's essay, translated for the first time into English, which closes xxxxx. Further contributors include Hal Abelson, Leif Elggren, Jonathan Kemp, Aymeric Mansoux, and socialfiction.org.




The Michiganensian


Book Description




Logical Dilemmas


Book Description

This authoritative biography of Kurt Goedel relates the life of this most important logician of our time to the development of the field. Goedel's seminal achievements that changed the perception and foundations of mathematics are explained in the context of his life from the turn of the century Austria to the Institute for Advanced Study in Princeton.







The Schur Algorithm, Reproducing Kernel Spaces and System Theory


Book Description

The class of Schur functions consists of analytic functions on the unit disk that are bounded by $1$. The Schur algorithm associates to any such function a sequence of complex constants, which is much more useful than the Taylor coefficients. There is a generalization to matrix-valued functions and a corresponding algorithm. These generalized Schur functions have important applications to the theory of linear operators, to signal processing and control theory, and to other areas of engineering. In this book, Alpay looks at matrix-valued Schur functions and their applications from the unifying point of view of spaces with reproducing kernels. This approach is used here to study the relationship between the modeling of time-invariant dissipative linear systems and the theory of linear operators. The inverse scattering problem plays a key role in the exposition. The point of view also allows for a natural way to tackle more general cases, such as nonstationary systems, non-positive metrics, and pairs of commuting nonself-adjoint operators. This is the English translation of a volume originally published in French by the Societe Mathematique de France. Translated by Stephen S. Wilson.




Theta Constants, Riemann Surfaces and the Modular Group


Book Description

There are incredibly rich connections between classical analysis and number theory. For instance, analytic number theory contains many examples of asymptotic expressions derived from estimates for analytic functions, such as in the proof of the Prime Number Theorem. In combinatorial number theory, exact formulas for number-theoretic quantities are derived from relations between analytic functions. Elliptic functions, especially theta functions, are an important class of such functions in this context, which had been made clear already in Jacobi's Fundamenta nova. Theta functions are also classically connected with Riemann surfaces and with the modular group $\Gamma = \mathrm{PSL (2,\mathbb{Z )$, which provide another path for insights into number theory. Farkas and Kra, well-known masters of the theory of Riemann surfaces and the analysis of theta functions, uncover here interesting combinatorial identities by means of the function theory on Riemann surfaces related to the principal congruence subgroups $\Gamma(k)$. For instance, the authors use this approach to derive congruences discovered by Ramanujan for the partition function, with the main ingredient being the construction of the same function in more than one way. The authors also obtain a variant on Jacobi's famous result on the number of ways that an integer can be represented as a sum of four squares, replacing the squares by triangular numbers and, in the process, obtaining a cleaner result. The recent trend of applying the ideas and methods of algebraic geometry to the study of theta functions and number theory has resulted in great advances in the area. However, the authors choose to stay with the classical point of view. As a result, their statements and proofs are very concrete. In this book the mathematician familiar with the algebraic geometry approach to theta functions and number theory will find many interesting ideas as well as detailed explanations and derivations of new and old results. Highlights of the book include systematic studies of theta constant identities, uniformizations of surfaces represented by subgroups of the modular group, partition identities, and Fourier coefficients of automorphic functions. Prerequisites are a solid understanding of complex analysis, some familiarity with Riemann surfaces, Fuchsian groups, and elliptic functions, and an interest in number theory. The book contains summaries of some of the required material, particularly for theta functions and theta constants. Readers will find here a careful exposition of a classical point of view of analysis and number theory. Presented are numerous examples plus suggestions for research-level problems. The text is suitable for a graduate course or for independent reading.




Spatial Patterns


Book Description

The study of spatial patterns in extended systems, and their evolution with time, poses challenging questions for physicists and mathematicians alike. Waves on water, pulses in optical fibers, periodic structures in alloys, folds in rock formations, and cloud patterns in the sky: patterns are omnipresent in the world around us. Their variety and complexity make them a rich area of study. In the study of these phenomena an important role is played by well-chosen model equations, which are often simpler than the full equations describing the physical or biological system, but still capture its essential features. Through a thorough analysis of these model equations one hopes to glean a better under standing of the underlying mechanisms that are responsible for the formation and evolution of complex patterns. Classical model equations have typically been second-order partial differential equations. As an example we mention the widely studied Fisher-Kolmogorov or Allen-Cahn equation, originally proposed in 1937 as a model for the interaction of dispersal and fitness in biological populations. As another example we mention the Burgers equation, proposed in 1939 to study the interaction of diffusion and nonlinear convection in an attempt to understand the phenomenon of turbulence. Both of these are nonlinear second-order diffusion equations.