 Noga Alon
Noga Alon researches combinatorics, graph theory, their applications to theoretical computer science, combinatorial geometry and number theory, and the relationship of combinatorial algorithms and circuit complexity. Some of his papers, along with a
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 Noise Removal from Images  J. A. Sethian
A paper and movie on noise removal. Level Set Methods exploit the fact that curves moving under their curvature smooth out and disappear. The idea is to view the pixel values as a topographic map; the intensity (somewhere between white and black) at each
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 Nonlinear Dynamical Systems at San Diego State  Ricardo Carretero
The NLDS group at San Diego State offers new graduate programs in Dynamical Systems and Applied Mathematics.
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 Nonlinear Dynamics (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
Links to sites on nonlinear dynamics, chaos and turbulence studies, complex systems and visualization, continued fractions and chaos, dynamical systems and technology, dynamics and stability of systems, with indications of level and type of resource offered.
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 Nonlinear Physics Group  Technical University, Darmstadt, Germany
A research group whose research areas include sonoluminescence, levitated drops, and acoustic and optically induced cavitation (view MPEG movies of bubbles!) A Java applet, Nonlinear Dynamics Online, provides visualizations of data sets: you may use
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 Nonlinear Programming FAQ  Optimization Technology Center, Northwestern University and Argonne National Laboratory
Posted monthly to Usenet newsgroup sci.opresearch. "What is Nonlinear Programming?" "What software is there for nonlinear optimization?" "I wrote an optimization code. Where are some test models?" "What references and Web links are there in this field?"
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 Nonlinear Regression Analysis Program  Phillip H. Sherrod
NLREG is a statistical analysis program for Windows 95/98 and Windows NT which performs linear and nonlinear regression analysis and curve fitting. The software package determines the values of parameters for an equation, the form of which you specify,
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 Nonlinear Science FAQ  James D. Meiss
The Frequently Asked Questions document for the newsgroup sci.nonlinear.
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 Nonlinear Science Today/Journal of Nonlinear Science  SpringerVerlag New York Inc.
Nonlinear Science Today and Journal of Nonlinear Science provide a forum for the dissemination of new results, methods, and ideas in nonlinear dynamics. The publications' goals are to facilitate the crossfertilization and interaction between different
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 Nonlinear Systems Laboratory  Massachusetts Institute of Technology
A group dedicated to the analysis of nonlinear systems: list of publications (some abstracts are available online) and animations of a robot arm catching a ball and a paper airplane.
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 Nonpartisan Education Review
The Nonpartisan Education Review provides a forum for those interested in education issues but put off by the education policy groups affiliated with the political parties. The groupo aims to make a difference by remaining nonaligned and nonpartisan.
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 NonPathological Warp Drive within RandallSundram Brane World  Paul Hoiland
Discussion of a Pathology Free Warp drive based upon the RandallSundrum single Brane model.
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 Nonsexist Solution of the Menage Problem  Bogart, Doyle
A paper that appeared in the American Mathematical Monthly. The ménage problem asks for the number of ways of seating couples at a circular table, with men and women alternating, so that no one sits next to his or her partner. The paper presents
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 Norwegian Mathematical Society
Site is in Norwegian. Purpose, activities, history, membership, meetings.
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 Not Even Wrong  Peter Woit, Department of Mathematics, Columbia University
A blog on a range of topics in mathematics and theoretical physics, and superstring theory in particular, dating to Match, 2004. Read the author's reflections and comments left by others.
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 The Novel Polyhedra of Albert P. Carpenter  Albert P. Carpenter
A series of videos of slides exploring Exploded, Crown, Open and Lattice Polyhedra.
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 Novosoft Inc.
Novosoft (with the Siberian Branch of Russian Academy of Sciences (SB RAS) offers R&D services including conducting scientific research in different branches of Computer Science, feasibility analysis, and implementing large scienceintensive software
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 NSF Workshop on Dynamics and Bifurcations of Patterns in Dissipative Systems  Iuliana Oprea
Recent experimental results have demonstrated a variety of new patterns that can be observed in macroscopic systems far from equilibrium. Understanding these patterns is a major challenge for theoretical research. The workshop (1922 May 2003, Colorado
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 NT Number Theory (Front for the Mathematics ArXiv)  Univ. of California, Davis
Number Theory preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 numb3rs blog  Mark Bridger, Department of Mathematics, Northeastern University
A blog where math professor Bridger posts mathematical comments on the TV show "Numb3rs". Dating back to February, 2005, posts include "Math and March Madness" and "Random motion and FokkerPlanck" and "Acoustic fingerprints and the JFK assassination"
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 The Number Empire  Vitalii Vanovschi
Enter a positive integer up to 10^12, press the "Go!" button, and The Number Empire states  in yes/no format  whether you entered a prime number, a Bell number, a Catalan number, or a factorial. The same single click displays the integer written out
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 The Number of Latin Rectangles [PDF]  Peter Doyle
A paper that shows how to generate an expression for the number of kline Latin rectangles for any k. The computational complexity of the resulting expression, as measured by the number of additions and multiplications required to evaluate it, is on the
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 Number Pi and Golden Section: the decimals occurrences are not random  JeanYves Boulay
An exploration of the occurrence of patterns of the digits in decimal representations of pi and the golden section.
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 Number Recreations  Shyam Sunder Gupta
Recreational aspects of number theory, prime numbers, and the like. Currently includes rare numbers, EPORNS (Equal Product Of Reversible Numbers), unique numbers, unlucky 13, fascinating squares, curious properties of 153, and amicable numbers (including
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 Numbers (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
Links to sites about particular numbers; dates; palindromes; Gaussian integers; Carmichael numbers; continued fractions; e; Egyptian fractions, mathematics, and numerals; constants; Fermat; Fibonacci numbers; pi; large numbers, sequences, prime numbers,
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 NumberTheoretic Hacks  David Eppstein, Theory Group, ICS, UC Irvine
Simple numbertheoretic algorithms. Egyptian Fractions  algorithms and references; C++ implementation of J. H. Conway's "nimber" arithmetic; C++ fast algorithm for computing 2adic inverse; C program for rational approximation of real numbers; Interference
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 Number Theory Centres  Keith Matthews, Dept of Math, University of Queensland, Brisbane, Australia
An alphabetical list of links to international number theory groups and research centres.
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 Number Theory Foundation
A foundation for collecting donations from supporters of number theory and disbursing them to encourage research. Supporters have directed available funds towards activities in computational and combinatorial number theory, and also towards general number
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 Number Theory: Historical things  Keith Matthews, Dept. of Math, University of Queensland, Brisbane, Australia
Biographies of past number theorists and various items of historical interest, including prizes, photos, and mathematical family trees.
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 Number Theory List  Yahoo Groups
Archives of a mailing list devoted to discussions of the serious mathematical study of the additive and multiplicative properties of positive integers including powers of integers, squares, cubes, triangular, factorial, fibonacci, composite, prime, perfect,
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 Number Theory (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
An extensive list of links to sites with information about number theory, classified by level and type of resource.
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 Number Theory Web  Keith Matthews, Dept of Math, University of Queensland, Brisbane, Australia
A collection of links to online information of interest to number theorists everywhere, including number theorists' home pages and departmental listings.
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 numberworld.org  Alexander J. Yee
Yee takes mathematical constants such as pi, SQRT2, the golden ratio, e, log(2), log(10), and zeta(3) and calculates them to billions of digits. Read about and download ycruncher, his multithreaded piprogram. See also his timetable of notable large
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 The Numerical Algorithms Group (NAG)  Oxford, UK
Products and services; libraries for the solution of mathematical problems: numerical software; statistical software covering all areas of statistical computation; compilers, tools, and code coverters for developers and programmers, symbolic software
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 Numerical Analysis Digest Search Interface  Netlib
The NA Digest is a collection of articles on topics related to numerical analysis and those who practice it. All issues are indexed using Glimpse. To execute a search, enter a phrase or word into the form and choose the appropriate settings for your query.
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 Numerical Analysis  Math Forum
Links to some of the best Internet resources for numerical analysis: Web sites, software, Internet projects, publications, and public forums for discussion.
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 Numerical Methods  Douglas N. Arnold; Mathematics Dept., Penn State University
An extensive list of centers (including online services and search engines), individual libraries, other sites (general and specific), journals, books, online publications, and other resources for numerical methods.
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 Numerical Problems (Algorithm Design Manual)  Steven S. Skiena
A chapter from the Algorithm Design Manual, by Steven S. Skiena. Specific algorithms: Solving Linear Equations; Bandwidth Reduction; Matrix Multiplication; Determinants and Permanents; Constrained and Unconstrained Optimization; Linear Programming; Random
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 Numerical Recipes in C: The Art of Scientific Computing  Books OnLine  Press, Teukolsky, Vetterling, Flannery; Cambridge University Press
An online book available in Adobe Acrobat or PostScript formats that outlines the method of organizing a program, and then provides the methodology and (copyrighted) source code in the C programming language for: linear algebraic equations, interpolation
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 Numerical Relativity Group  Penn State University
A group established to promote interaction between students, postdocs and faculty interested in the computational aspects of General Relativity and its applications to Cosmology and Astrophysics. The group members are affiliated with the Departments
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 Numericana.com  Gérard P. Michon
The online companion of Numericana, this site contains excerpts from Michon's book, including the entire glossary of scientific terms. Browse an index with pithy summaries, browse by popularity, or search nearly two hundred of his "final answers" of readers'
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 Numeritek  E. F. Toro
Home of Numerica, a library of source codes for solving hyperbolic partial differential equations using a broad range of modern, highresolution shockcapturing conservative and nonconservative numerical methods. Most of the programs are based on upwind
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 nUniform Tilings  Brian Galebach
Illustrates the edgetoedge tilings of regular polygons having n transitivity classes of vertices for 1<=n<=6. Prior to my doing so, no enumeration had ever been completed of the nuniform tilings for any n>3.
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 NuPrl Proof Development System  Cornell University, Ithaca, NY
A tacticbased proof assistant developed over the last 15 years at Cornell University. Its features include: very expressive logical language based on MartinLof type theory, extensive library of formal mathematics and automata theory, possibility of
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 OA Operator Algebras (Front for the Mathematics ArXiv)  Univ. of California, Davis
Operator Algebra preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 The ObjectOriented Numerics Page  Todd Veldhuizen
Mailing lists; Free libraries of software for linear algebra, arrays and images, neural networks and genetic algorithms, multiprecision/exended exponent data types, differential equations, automatic differentiation and interval arithmetic, visualization,
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 Observer Mechanics: a Formal Theory of Perception  Bennett, Hoffman, Prakash
Full book online in pdf format. An inquiry into the subject of perception, the book suggests an approach to the study of perception that attempts to be both rigorous and general. The authors also attempt to introduce a new formalism, including mathematical
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 Occam Press  Peter Schorer
"The skeptical mathematician is invited to improve upon the current implementations of the 3x + 1 strategy...." In addition to the Collatz conjecture, Schorer offers a simple proof of Fermat's Last Theorem, articles on Occam's Razor and programming,
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 OC Optimization and Control (Front for the Mathematics ArXiv)  Univ. of California, Davis
Optimization and Control preprints, from the U.C. Davis front end for the xxx.lanl.gov ePrint archive, a major site for mathematics preprints that has incorporated many formerly independent specialist archives. Search by keyword or browse by topic.
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 OER Commons  Institute for the Study of Knowledge Management in Education
An open learning network for teachers and professors to access their colleagues' course materials, share their own, and collaborate. The Open Educational Resources site features tags, ratings, comments, reviews, and social networking functions, as well
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