 Semidefinite Programming  Christoph Helmberg
A page for the entire semidefinite community. Links to lists of: Conferences and Workshops; Interior Point Algorithms; Geometry and Complexity; Applications in Combinatorial Optimization; Applications in Control Theory; Eigenvalue Oriented Approaches;
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 Semigroup Theory  Jim Renshaw
A directory of Semigroup Theorists, bibliographic database, and conferences in Group and Semigroup Theory. With a link to a package for doing commutative diagrams, by Paul Taylor.
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 SemiSimple Lie Algebras and their Representations  Robert Cahn
A postscript version of the book, originally published by BenjaminCummings in 1984. Chapters include: SU(2); SU(3); The Killing Form; The Structure of Simple Lie Algebras; A Little about Representations; More on the Structure of Simple Lie Algebras;
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 The SeqFan Mailing List  Olivier Gérard
A mailing list for FANs of Integer SEQuences, bilingual in French and English, with a French acronym: Suites Entières: Questions, Formules, Analyse, Nomenclature, which translates as Problems, Formulas, Analysis, and Inventory of Integer Sequences.
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 Sequuntur.com: the FREE way to mesh generation !
We are a research group offering FREE freeform triangular and tetrahedral mesh generation for open CASCADE (openCASCADE) models.
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 Series Math Study  Tue N. Vu
Formulas with proofs for many different series. Site encourages readers to submit their own contributions.
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 Set Theoretic Analysis (Topology Atlas)  Krzysztof Chris Ciesielski, Editor
An interactive encyclopedic reference for Set Theoretic Analysis, with most current research available immediately through the web and ftpcapabilities of the Topology Atlas. Contents: What is Set Theoretic Analysis?; What's new; Surveys; Preprints;
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 Set Theory  Jean A. Larson; Dept. of Mathematics, Univ. of Florida
Links to home pages of set theorists.
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 Set Theory Page  Luis E. Sanchis; Syracuse University
A collection of links to sites on the Web related to set theory.
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 SF, posets, and coxeter/weyl  John Stembridge
This is a group of combinatorics Maple packages for Unix and Mac operating systems, specifically for studying symmetric functions, partially ordered sets, root systems, and Lie algebras.
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 SG Symplectic Geometry (Front for the Mathematics ArXiv)  Univ. of California, Davis
Symplectic Geometry 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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 SHAPES  XOX Corporation
Providing advanced C/C++ libraries and applets for application developers in GeoScience, CAE, CAD, Medicine, and other industries that require geometry and topology. Their primary product is Shapes®, a geometry system. Site offers contact and product
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 SHAREWARE.COM  CNET, Inc.
Search more than 250,000 files in the former Virtual Software Library: first select the platform of your choice, then enter the word or filename to search for. You may also search for files in a specific archive here by first selecting the archive of
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 Sharp3D.Math Project Page  Eran M. Kampf
A .NET Numerics Library built in C#. It contains objectoriented classes for linear algebra, geometry and a broad range of numerical techniques for the Microsoft .NET framework. Topics covered: Matrices and Vectors, Complex Numbers, Distance Methods,
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 Shock and Vibration Software and Tutorials  Tom Irvine, Vibrationdata.com
Free downloadable Windows software and tutorials with an emphasis on acoustics, shock, vibration, and signal processing. Much of the material is based on Fourier transforms, Laplace transforms, and other mathematical functions. The author also offers
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 Short Signal Harmonic Spectra and Approximation  Dmitriev E.V.
The author writes: "Presently traditional ways to determine signal spectra are based on the expansion of functions in Fourier series or on their representation by Fourier integrals with applying a system of basis ORTHOGONAL functions. For the first time,
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 ShtetlOptimized  Scott Aaronson
Blog posts include "Teaching your students not to need a teacher," "Ten Signs a Claimed Mathematical Breakthrough is Wrong," "Essentials of complexitytheoretic standup comedy," "My take on the Koblitz affair, "Logicians on safari," and "Unparadox Contest."
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 SIAM Activity Group on Orthogonal Polynomials and Special Functions  Martin Muldoon
A group for promoting basic research in orthogonal polynomials and special functions; furthering the application of this subject in other parts of mathematics and in science and industry; and encouraging and supporting the exchange of information, ideas,
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 SIAM Journal on Discrete Mathematics  Society for Industrial and Applied Mathematics
A journal that publishes research articles on a broad range of topics from pure and applied mathematics, including combinatorics and graph theory, discrete optimization and operations research, theoretical computer science, to coding and communication
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 SIAM Journals  Society for Industrial and Applied Mathematics
The journals of the Society for Industrial and Applied Mathematics (SIAM): Applied Mathematics; Computing; Control and Optimization; Discrete Mathematics; Mathematical Analysis; Matrix Analysis and Applications; Numerical Analysis; Optimization; Scientific
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 Signal Processing Laboratory  Thomas W. Parks, Director; Cornell University, Ithaca, NY
People; wavelets and multiresolution analysis research.
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 Simon Plouffe  Simon Plouffe
Home page of Simon Plouffe, pi expert and originator of Plouffe's Inverter. Contains links to his articles and algorithms for his approximations of various constants.
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 Simons Foundation
This private foundation advances the frontiers of research in mathematics, theoretical computer science, and theoretical physics. Simons Foundation grants have established postdoctoral fellowships, promoted collaboration between researchers, created
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 Simul8  Simul8 Corporation
Developers of SIMUL8, for discrete event simulation. The company’s products include the plugins: SIMUL8 Profit, SIMUL8 OPTIMIZ, SIMUL8 TimeView, SIMUL8 Transport, SIMUL8 Process, and SIMUL8 Animation for VISIO.
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 SINGULAR  Greuel, Pfister, Schoenemann; Dept. of Mathematics, Univ. of Kaiserslautern
A computer algebra system for polynomial computations, with special emphasis on commutative algebra, algebraic geometry, and singularity theory.
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 The SISL Nurbs Library  SINTEF Applied Mathematics
A library of NonUniform Rational BSplines (NURBS) software, developed and
maintained by the Department of Geometric Modelling at SINTEF Applied Mathematics. The SIntef Spline Library (SISL) contains all the necessary functionality for building applications
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 Skills and Competencies Needed to Succeed in Today's Workplace  NCREL: North Central Regional Educational Laboratory; Learning Point Associates
Because the world of work is changing, the U.S. Departments of Labor and Education formed the Secretary's Commission on Achieving Necessary Skills (SCANS) to study the kinds of competencies and skills that workers must have to succeed in today's workplace.
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 SLATEC (Common Mathematical Library, Fortran)  Kirby W. Fong, Thomas H. Jefferson, Tokihiko Suyehiro, Lee Walton
An extensive publicdomain FORTRAN source code library (consisting of more than 1400 routines and 300,000 lines of code and documentation) developed and maintained by a consortium of Department of Energy and Department of Defense national laboratories.
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 Sloan Digital Sky Survey
The astronomical surveys of the Sloan Digital Sky Survey (SDSS) have "obtained deep, multicolor images covering more than a quarter of the sky and created 3dimensional maps containing more than 930,000 galaxies and more than 120,000 quasars." SDSS's
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 A Small Puzzle  Joe Fields
The site offers a visual proof that the sum of the first n consecutive odd numbers is n^2, the "L"decomposition.
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 Smarandache Algebraic Structure, book series.  Elibrary of Science
Smarandache Algebraic Structures, book series by W. B. Vasantha Kandasamy: Vol. I: Groupoids; Vol. II: Semigroups; Vol. III: Semirings, Semifields, and Semivector Spaces; Vol. IV: Loops; Vol. V: Rings; Vol. VI: Nearrings; Vol. VII: Nonassociative Rings;
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 SMART: Explorapaedia of Statistical and Mathematical Techniques  Richard Sharp, BioSS
A collaborative approach to the production and delivery, via the web, of training in quantitative methods. Modules include: growth curve modelling, antedependence (repeated measures) modelling, analysis of molecular variance, sequential acceptance sampling,
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 Séminaire Lotharingien de Combinatoire
An electronic journal on combinatorics. Abstracts of the papers are available online, and the full articles can be downloaded.
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 Séminaire Lotharingien de Combinatoire  Institut für Mathematik, Universität Wien, Vienna, Austria
A joint seminar in Combinatorics for the Universities of Bayreuth, Erlangen and Strasbourg, as well as the other Universities along the Lotharingian boundaries. The Seminar hosts an international electronic journal carrying the same name, with abstracts
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 Sociedade Portuguesa de Matemática (SPM)
Portuguese Mathematical Society. Periodicals, monographs, events, membership information.
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 Societat Catalana de Matemàtiques  L'Institut d'Estudis Catalans
The Catalan Mathematical Society. Barcelona 2000, the Third European Congress of Mathematics, and World Mathematical Year 2000.
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 Society for Chaos Theory in Psychology & Life Sciences
An association of researchers and practitioners interested in applying dynamical systems, chaos, and complexity theory to psychology and the life sciences. Joining the society; contents and submission information for the journal Nonlinear Dynamics, Psychology,
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 Society for Industrial and Applied Mathematics (SIAM)
SIAM was founded in 1951 to advance the application of mathematics to science and industry, promote mathematical research that could lead to effective new methods and techniques for science and industry, and to provide media for the exchange of information
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 Society for Nonlinear Dynamics and Econometrics  Bruce Mizrach
The Society seeks to promote the use of nonlinear methods in economics and finance from both a theoretical and empirical perspective. Call for papers; programs of past symposia; Journal (Studies in Nonlinear Dynamics and Econometrics  abstracts and bibliographies
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 Society for Risk Analysis (SRA)
A multidisciplineary, international open forum for those interested in risk analysis, broadly defined to include risk assessment, characterization, communication, management, and policy. Interests include risks to human health and the environment, both
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 Society for Special Functions and their Applications (SSFA)  S. Ahmad Ali
A group based in India which exclusively caters to and coordinates research activities in this branch of analysis. The Society has interaction with the SIAM Activity Group  SIAM OPSF. Under the agreement the permission has been granted to SSFA, India
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 Society for Special Functions & their Applications, India
Publications, links, and conferences of the society. The main objectives of the Society are: to promote basic research in the field of Special Functions and their application in other areas of mathematics and in Science and industry; to encourage and
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 Society of Manufacturing Engineers (SME)
The premier source of learning and knowledge for the manufacturing community. An international professional society dedicated to serving its members and the manufacturing community through the advancement of professionalism, knowledge, and learning. Founded
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 Software and Animations (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of pointers to specialized software, Java applets, video sequences, and other forms of interactive or animated geometry.
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 Software Development  Dept. of Mathematics, University of Arizona
A page with links to mathematical and graphics packages developed within the University of Arizona Mathematics Department. Researchrelated and instructional software, with packages related to computer algebra and raster graphics; vector graphics and
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 Software for Algebra and Geometry Experimentation  William Stein et al.
Free and open software for researching and teaching algebra, geometry, number theory, cryptography, and more. SAGE performs group theory and combinatorics (using GAP), symbolic computation and calculus (Maxima), commutative algebra (Singular), number
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 Software for Graphics and Data Analysis  S. Baum; Dept. of Oceanography, Texas A&M University
Links to software with descriptions, features, and where to find it, in (mostly) the following categories (or check out the complete alphabetical list): mostly graphics; mostly numerical analysis and number crunching; mostly data formats; commercial packages;
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 Software from Alan J. Miller  Alan J. Miller
Dozens of FORTRAN downloads, organized into logistic regression, TOMS algorithms, special code for F and NAS compilers, code converted from the Naval Surface Warfare Center Library of Mathematics, miscellaneous other code, and applied statistics algorithms.
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 Software (Mathematics Archives)  University of Tennessee, Knoxville (UTK)
An extensive collection of links to software, with abstracts and reviews, organized in four different ways: by platform (Macintosh, MSDOS) and then by subject; interactive texts (using a commercial package such as Mathematica, Maple or Mathkit to interact
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 Software  School of Statistics, University of Minnesota
XLISPSTAT  a statistical environment based on a dialect of the Lisp language called XLISP; MacAnova, an interactive program for statistical analysis and matrix algebra; Rcode  software that accompanies the book, An Introduction to Regression Graphics,
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