 GR Group Theory (Front for the Mathematics ArXiv)  Univ. of California, Davis
Group 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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 The Grothendieck Biography Project  Ferment Magazine
The ongoing translation of Alexandre Grothendieck's Récoltes et Semailles into English.
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 Grothendieck Circle  Leila Schneps
Alexandre Grothendieck's published articles, unpublished research, letters, and translations: The Cohomology Theory of Abstract Algebraic Varieties, Standard Conjectures on Algebraic Cycles, Hodge's General Conjecture Is False for Trivial Reasons, Groupes
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 Groupe Fractales (INRIA)  Benoît Leblanc and Frédéric Raynal
A group of researchers studying the application of fractal techniques to complex systems, especially signal processing. Introduction to the theoretical aspects of fractal analysis; genetic algorithms; introduction to timescale analysis, in French; applications,
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 Groupoid Home Page  Ramsay, Chiaramonte, Woo, Renault, Ramazan; Institute of Mathematics of the Romanian Academy
Papers on groupoids; other sources on groupoids; bibliography; an address book of mathematicians interested in groupoids; and future conferences.
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 Group Pub Forum  G. C. Smith
The community pages for discussing any aspect of Group Theory, the mathematics of symmetry. Group Theory is a branch of algebra, but has strong connections with almost all parts of mathematics. Announcements, books and journals, conference information,
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 Groups & Graphs Home Page  Bill Kocay
A software package for graphs, digraphs, combinatorial designs, and their automorphism groups. Features include automorphism group computation; graph certificate which identifies a graph uniquely up to isomorphism; Hamiltonian cycles; planarity test and
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 Gsystems  Vladimir Ladma
A paper presenting an algebraic theory of musical chord structures that seeks to provide a simple algorithm for generating these structures.
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 GT Geometric Topology (Front for the Mathematics ArXiv)  Univ. of California, Davis
Geometric Topology 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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 Guide to Wavelet Sources  Steve Baum; Dept of Oceanography, Texas A&M University
A 1996 site with links to tutorials, software reviews, and other wavelet sites. [Compressed using gzip so cannot be rendered by all browsers.]
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 Guy Kindler  The Official Site  Guy Kindler
A mathematics Ph.D. student at Tel Aviv University. Math puzzles are ranked from easy to tough. A paper on approximation and various resources for a seminar on computational models may be downloaded in PostScript format. Related PowerPoint presentations
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 The Hadamard Maximal Determinant Problem  Will Orrick, Bruce Solomon
The site lists the largest known determinants of {1,1} matrices. It also has links to other online
sources of large determinant matrices and references to the literature.
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 HAKMEM  Beeler, Gosper, Schroeppel; Artificial Intelligence Laboratory, MIT
A list of math and computerrelated problems, unsolved in 1972 when the list originated, compiled "with the hope that a record of the random things people do around here can save some duplication of effort  except for fun." Topics include: Geometry,
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 Hamiltonian Circuit Algorithm  Ashay Dharwadker
A new algorithm for finding Hamiltonian circuits in graphs with a
constructive proof of Dirac's theorem, applications to finding Knight's
Tours and a demonstration program, by Ashay Dharwadker.
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 Handbook of Combinatorial Designs  CRC Press
Home page for the Handbook. Contains the Table of Contents (postscript and text); Acknowledgments; New Results that have appeared since the Handbook was sent to press; Errata; and Ordering Information.
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 Harmonic Maps Bibliography  Burstall, Lemaire, Rawnsley
An ongoing project to provide a searchable, comprehensive, and uptodate bibliography in the area of harmonic maps. The bibliography is in TiB format (a bibliographical preprocessor for TeX, LaTeX etc.) from which BiBTeX, TeX and PostScript versions
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 Harmonic Maps Bibliography  Department of Mathematics, University of Florida
The Tib formatted bibliography on harmonic mappings between Riemannian manifolds maintained and offered for anonymous ftp at ftp.maths.bath.ac.uk and at ftp.maths.warwick.ac.uk in England. Formats other than Tib are also available.
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 Harmonious Colourings and Achromatic Number  Keith Edwards; Department of Applied Computing, University of Dundee
A vertex colouring of a graph is an assignment of a colours to the vertices, with the requirement that adjacent vertices receive distinct colours. A harmonious colouring is a vertex colouring with the added requirement that each pair of colours appears
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 HartMath  Java Computer Algebra Applet  Klaus Hartlage
HartMath is a computer algebra system available free under GNU public license. It features large number arithmetic, symbolic derivatives/integration, linear algebra, plot functions, numeric functions, patternmatching rules, and pure functions, and runs
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 Harvard University Press
A site that includes short history of the press; Harvard books; featured books; press releases for new and forthcoming books; the Loeb Classical Library; and a book exhibit schedule. You may email to receive free subject brochures or search for mathematics.
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 HASTAC Initiative  Humanities, Arts, Science, and Technology Advanced Collaboratory
HASTAC ("haystack") is a network of individuals and institutions inspired by the possibilities that new technologies offer us for shaping how we learn, teach, communicate, create, and organize our local and global communities. HASTAC is open to anyone;
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 Headlines & Deadlines for Students  American Mathematical Society (AMS)
The American Mathematical Society's Public Awareness Office has announced a new email notification service. Headlines & Deadlines for Students alerts subscribers about applications for fellowships, grants, meeting registrations, and other timesensitive
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 Hedgehog  a Java Mathematical and Geometry API  Hedgehog Software
The Hedgehog Java API is tailored for mathematical and 2D/3D geometric modelling. Written in 100% Java it supports numerous mathematical packages and 2D and 3D geometric objects. Imports/exports are supported in XML, X3D and HSQLDB database formats.
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 helaman ferguson sculpture  Helaman Ferguson
A mathematician sculptor whose stone and bronze artworks include "Aperiodic Penrose," the Coons Siggraph award, "Esker Trefoil Torus," "Fibonacci Fountain," "Fibonacci Tetrahedron," "Figureeight Knot," "Eine Kleine Link Musik," "Torus with CrossCap,"
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 Helmer Aslaksen
A mathematics professor at the National University of Singapore. Research involves abstract algebra, including the trigonometry of symmetric spaces, and calculations for the Chinese, Islamic, and Indian calculators. Papers about these topics may be
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 Helmut Prodinger
Helmut Prodinger researches analysis of algorithms, combinatorics, tree enumeration, and number theory. Many of his papers on these subjects are available online in PostScript, .dvi, and/ or TeX form.
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 The Helsinki Logic Group  University of Helsinki, Finland
The Helsinki Logic Group is a team of logicians that has gathered in the Department of Mathematics of the University of Helsinki during the past ten years. The main topics of research are: Finite Model Theory  generalized quantifiers, games and descriptive
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 Henry Segerman's webpages  Henry Segerman
Mathematical and typographical art "of various kinds and dimensions." See, in particular, Segerman's 3D printed sculpture, book covers and posters, diamond Go, ambigrams, autologlyphs, autological words, Escher's Printgallery, and mathart tshirts available
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 Herbert Wilf
Herbert Wilf is a combinatorialist. The entire text of his books generatingfunctionology, A = B, and Algorithms and Complexity may be downloaded in PDF format, as may his "East Side, West Side" lecture notes on combinatorial objects and Maple programming.
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 The Hexagonal Honeycomb Conjecture  Thomas C. Hales; Dept. of Mathematics, Univ. of Pittsburgh
Hales has announced a proof of the Hexagonal Honeycomb Conjecture, which asserts that any partition of the plane into regions of equal area has perimeter at least that of the regular hexagonal honeycomb tiling. This paper in a variety of formats (postscript,
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 High Rank Elliptic Curves with Prescribed Torsion  Andrej Dujella, Zagreb
The highest rank currently known for an elliptic curve over Q with each of
the possible torsion groups.
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 Hilbert II  Michael Meyling
A predicate calculusbased proof checker, which can check proofs drawn from many different Internet sites.
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 Hilbert's Building Blocks  Robert J. Krawczyk
Investigating space curves to construct 3D forms. Work in 2D with Hilbert curves, spirolaterals, space filling curves, and recursive designs used as a springboard for generating and interpreting space curves.
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 Hilbert's Tenth Problem  Massachusetts Institute of Technology (MIT)
This directory contains files related to Yuri V. Matijasevich's book "Hilbert's Tenth Problem" (MIT Press, 1993), which is the English translation of "Desyataya Problema Gilb'erta" (Nauka, Moscow, 1993). All files in this directory are available via anonymous
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 Hilbert's Tenth Problem  Russian Academy of Sciences
A page to promote research connected with the negative solution of Hilbert's Tenth Problem and developed techniques, which have applications in the theory of algorithms, algebra, number theory, model theory, proof theory and in theoretical computer science.
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 Historical Mathematics Monographs  Cornell University Library
More than 550 books in English, French, German, and Italian, scanned from originals held by the Cornell University Library. The Collection is indexed, can be browsed by author and title, and is freely available online to the public.
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 A History of Mathematical Notations  Florian Cajori
"In this history it has been an aim to give not only the first appearance of a symbol and its origin, but also to indicate the competition encountered and the spread of the symbol among writers in different countries...." The first volume of Cajori's
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 HO History and Overview (Front for the Mathematics ArXiv)  Univ. of California, Davis
Math History and Overview 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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 Home Page for John Robertson  John Robertson
Download original PDFs on curves of genus zero, Pell equations, binary quadratic equations, magic squares, and continued fraction expansions of sqrt(D) and (1+sqrt(D))/2.
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 Home Page of Andrei Toom, André Toom  Andrei Toom, Department of Statistics, Federal University of Pernambuco, Recife, Brazil
The home page of one of the developers of the ToomCook, or Toom3 algorithm, a method of multiplying two large integers. Toom's Englishlanguage mathematics articles, published in journals such as the Journal of Statistical Physics, include "NonErgodic
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 Homepage of Keith Matthews  Dept. of Mathematics, Univ. of Queensland, Australia
Matthews is a Senior Lecturer whose professional interests are number theory, teaching, and traversing the World Wide Web to uncover things of interest to number theorists for the Number Theory Web. Links to mathematical interests, gateways (mainly mathematical)
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 Home Page of Persi Diaconis  Persi Diaconis
Download PDF and PostScript papers, organized by coauthor or by year of publication, such as Asymmetric onedimensional constrained Ising model; Random walk on trees and matchings; and Mathematical developments from the analysis of Riffleshuffling.
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 Homepage & Papers  Dr. Peter Singer
Dr. Singer is associated with the MeVisCenter for Diagnostic Systems and Medical Visualization at the Univ. of Bremen, Germany. His interests and publications include: mathematics of finance; Fourier analysis; fractals; medical image processing; stochastic
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 Home Page  Tony Roberts; Dept. of Mathematics and Computing, University of Southern Queensland, Australia
Links to recent research papers (titles, abstracts and electronic copies of recent research documents); software (computer routines to do various taks such as estimate fractal dimensions, solve DAEs, etc,, mainly in Matlab); teaching and other material
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 Homogeneous Transformation Matrices  Daniel W. VanArsdale
Explicit ndimensional homogeneous matrices for projection, dilation, reflection, shear, strain, rotation and other familiar transformations.
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 Hopfield Net for 8Queens Problem  Yuri Pryadkin
Given a standard chessboard and 8 chess queens, place them on the board so that no queen is on the line of attack of any other queen. The author's applet finds solutions to the general problem, with N queens on the NxN board. Tips and analysis of the
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 Hopf Topology Archive  Clarence Wilkerson, Dept. of Mathematics, Purdue University
The Hopf archive contains freely available articles and preprints as dvi, ps, text, or lj.gz files. Some short abstracts and a search engine are included, as well as pictures of topologists and some useful links concerning topology.
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 HostMath  Cui Wei
Input LaTeX, Tex, AMSmath or ASCIIMath, and this dynamic equation editor renders the notation for typesetting. HostMath formats for math, logic, symbols, Greek letters, trigonometry, arrows, and more.
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 The Houston Journal of Mathematics  Klaus Kaiser, Managing Editor, University of Houston
A quarterly refereed journal publishing original research papers on mathematical topics. It welcomes contributed papers that develop interesting, or important, new mathematical ideas and results or solve outstanding problems. Read titles and abstracts
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 How Many? A Dictionary of Units of Measurement  Russ Rowlett; University of North Carolina at Chapel Hill
A dictionary of both metric (SI) and English measurement units, with history, links to related sites, and a bibliography.
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