 Ted Spence's Home Page
Research into the classification of combinatorial designs. Recent work has entailed the classification of all Hadamard matrices of order 28. Links include: a List of Publications; 2designs; Hadamard matrices Twographs; Steiner S(2,4,25); Regular graphs
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 Teichmüller Navigator 2.0  Deva Van Der Werf; Bowdoin College, The Geometry Center
A graphical tool for visualising a tiling of a genus2 Riemann surface by octagons  for moving around in the Teichmüller space of a surface visually, to provide some sense of how a surface changes with different geometries upon it.
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 Templates for Linear Algebra Problems  Bai, Day, Demmel, Dongarra, Gu, Ruhe, and van de Vorst
The solution of linear systems of equations and eigenvalue problems lies at the
heart of most calculations in scientific computing. This paper discusses some recent developments designed to help the user on advancedarchitecture computers, focusing on
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 Terry McConnell's Home Page  Terry McConnell, Mathematics Department, Syracuse University
Download PDFs of tests given in McConnell's introductory calculus, Math 295. "Stuff" ranges from a remark on average velocity and an expository paper showing the details of how to derive the second order correction to the period of a plane pendulum using
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 Test Prep Review  Testprepreview.com
As the title of this site indicates, there are materials to help users review in preparation to take a variety of tests, including the GRE, SAT, ACT, and Praxis. Under each of the free practice test areas, there are selfassessment modules with a set
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 Tewodros Amdeberhan's Electronic Headquarters
Tewodros Amdeberhan studies combinatorics, number theory, special functions, partial differential equations, computer algebra, algorithmic proof theory, and harmonic analysis. His articles on these topics, as well as some unpublished musings, are available
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 TeX2HTML  Curtis, Housken; WebPrimitives
A conversion utility that translates .tex files into .html files without converting typeset mathematics to GIFs. TeX2HTML converts typeset mathematics into HTMLbased layout commands, calling on the SYMBOL font resident on all computers, to provide for
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 TeX, METAFONT, dvips, and Related Files  Stanford University
The files in subdirectories "dist" and "local" of this directory are master files for TeX and METAFONT, maintained personally by Donald E. Knuth. The dist/ directory contains the latest official sources for TeX, METAFONT, Computer Modern, and accompanying
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 T_{E}X THE WORLD  Avital Oliver
This addon to the FireFox browser takes TeX typesetting on any website and renders it as an image. TEX THE WORLD runs every 3 seconds on interactive websites, so it marks up chat sessions as well as HTMLenabled webmail, embedding symbols on the fly
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 Texture and Colour  Paul Bourke
In many texturing applications it is necessary to be able to "tile" the texture over a larger region than the texture segment covers. Bourke offers a discussion with examples of tiling formats, together with links to tiles: Tile; Brick, Tile; Stone tile;
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 TeX Users Group (TUG)
Founded in 1980 to provide leadership for users of TeX, Donald Knuth's revolutionary typesetting system, TUG represents the interests of TeX users worldwide. From this site you can find activities (calendar, TUGboat, TUG meetings, user groups, working
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 That's Mathematics!  Nate Eldredge
A mathematician's collection of "various sparetime projects." Blog posts of "diversions, distractions, and math," which date back to June, 2012, focus on Mathgen, Eldredge's perl program that uses contextfree grammar, LaTeX, and BibTeX to randomly generate
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 Theoretical and Numerical Approach to "Magic Angle" of Stone Skipping  Shinichiro Nagahiro and Yoshinori Hayakawa, Department of Physics, Tohoku University, Japan
As published in the American Physical Society's Physical Review Letters: Nagahiro and Hayakawa "... investigate the condition for the bounce of circular disks which obliquely impacts on the fluid surface. An experiment [C. Clanet, F. Hersen, and L. Bocquet,
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 Theoretical Computer Science  Elsevier Science
The journal is mathematical and abstract in spirit, but derives its motivation from practical and everyday computation. Its aim is to understand the nature of computation and to provide more efficient methodologies. All papers introducing or studying
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 Theory and Applications of Categories (TAC)
An electronic, refereed journal for articles that significantly advance the study of categorical algebra or methods, or that make significant new contributions to mathematical science using categorical methods. The scope of the journal includes: all areas
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 Theory and Applications of Categories (TAC)  Robert Rosebrugh, Ed.; Mount Allison University
The allelectronic, refereed journal on Category Theory, categorical methods and their applications in the mathematical sciences. The scope of the journal includes: all areas of pure category theory, including higher dimensional categories; applications
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 The Theory Group  University of St. Andrews, U.K.
The Theory Group investigates aspects of theoretical computer science including: specification; automated theorem proving techniques and applications (especially in computer algebra); computational logic, including logic programming and proof theory;
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 Theory of Tieknots  Yong Mao
The mathematical theory behind tying a necktie, with illustrations of the Four in Hand, the Pratt Knot, the HalfWindsor, and the FullWindsor, and a classification of necktie knots with respect to size and shape. Tying a tie knot is equivalent to a persistent
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 Theron J. Hitchman
Scholarship and teaching by a professor of mathematics at the University of Northern Iowa. Hitchman's research focuses on differential and metric geometry, dynamical systems, and Lie theory, with particular interest in discrete subgroups of semisimple
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 The Theta Foundation
A scientific and notforprofit organisation, promoting mathematical knowledge, based in Romania.
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 Those Amazing Flying Mathematicians  Keith Devlin (Devlin's Angle)
October is the month when those of us living in the United States see migrating birds moving south for the winter. How do they know which direction to fly?... Assuming that the average bird is not the mathematical equivalent of a college math major, how
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 Threedimensional Geometry (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on threedimensional geometry.
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 Three Years of Computing: Final Report On The Palindrome Quest  John Walker
A 1990 report on computations on the 196 problem: "Pick a number. Reverse its digits and add the resulting number to the original number. If the result isn't a palindrome, repeat the process. Do all numbers in base 10 eventually become palindromes through
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 Tiled CA  Brian Prentice
An interesting variation on the traditional 2D Cellular Automata simulators, for Windows.
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 Tile.Net  ListUniverse.com
A comprehensive Internet reference site for finding discussion lists (mailing lists); Usenet newsgroups; FTP sites; computer products and vendors; and Internet and Web design companies. Search mailing lists by keyword (algebra, calculus, etc.) to find
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 Tilings (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on tilings. One way to define a tiling is a partition of an infinite space (usually Euclidean) into pieces having a finite number of distinct shapes. Tilings can be divided into two types, periodic and
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 Timelines and Scales of Measurement  Niel Brandt
TEX, DVI, PDF, Postscript, and ASCII files: Science / Technology History Timeline; Evolutionary / Geological Timeline; Cosmological Timeline; Scales of Measurement.
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 Time Series Analysis and Forecasting; AUTOBOX  Automatic Forecasting Systems (AFS) Corporation
Autobox for Windows provides forecasting based on the BoxJenkins modelbuilding process, implemented for both ARIMA (univariate) modeling and Transfer Function (multivariate or regression) modeling. Features, prices, faqs, support, and mathematical information
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 TOMLAB  Optimization for Matlab  TOMLAB Optimization
The TOMLAB Optimization Environment is a powerful optimization platform for solving applied optimization problems in Matlab. TOMLAB provides a wide range of features, tools and services for your solution process.
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 Tom's Mathematical Things  Tom Womack
Links to many elliptic curve subjects, including curves of given rank and small conductor, Mordell curves of large rank, and interesting torsion groups, from a secondyear postgraduate mathematician at the University of
Nottingham, supervised by John
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 Topics in Advanced General Relativity  Sergei Winitzki
This is a course in advanced General Relativity. An introductory course of general relativity is assumed as a prerequisite. Topics include: Asymptotic structure of spacetime, conformal diagrams, null surfaces, Raychaudhury equation, black holes, the holographic
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 The Topological Zoo  The Geometry Center
For mathematicians and educators: a visual dictionary of surfaces and other mathematical objects, consisting primarily of movies, still images and interactive pictures. Can be used to complement classroom presentations, research papers and talks. Each
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 Topology Atlas  Shakhmatov and Watson; York University, Toronto, Ontario, Canada
A multipurpose center for electronic distribution of information related to topology, the mathematical study of surfaces, sometimes called "rubber sheet geometry" because topologists consider geometric figures as though they were drawn on infinitely
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 Topology Enters Mathematics  MacTutor Math History Archives
Linked essay describing the development of topology as a mathematical discipline from Euler through the early 20th century, including 17 references (books/articles).
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 The Topology of Chaos: Alice in Stretch and Squeezeland  Robert Gilmore, Marc Lefranc
Web site around the book The Topology of Chaos: Alice in Stretch and Squeezeland, which is devoted to topological analysis, a relatively new technique for extracting from chaotic data the topological signatures that determine the stretching and squeezing
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 Toposes, Triples and Theories  Michael Barr and Charles Wells
A revised and corrected version of the original (1983) Grundlehren der math is available free for downloading. Formats: DVI, PDF, PostScript.
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 Touch3D
A commercial Macintosh program for 3Dmodeling, concept design, industrial design, quick prototyping, mockups, packaging, scale models, physical renderings, production preparation, and unfolding/unwrapping. Touch3D is a complete 3D modeling/unfolding
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 The Traveling Salesman Problem (TSP)  Vasek Chvátal
The problem: given a finite number of cities and the cost of travel between each pair of them, find the cheapest way of visiting them all and returning to your starting point. This site includes a link to TSPLIB, Gerhard Reinelt's library of some hundred
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 Triangle: A TwoDimensional Quality Mesh Generator and Delaunay Triangulator  Jonathan Richard Shewchuk
Triangle generates exact Delaunay triangulations, constrained Delaunay triangulations, and quality conforming Delaunay triangulations. The latter can be generated with no small angles, and are thus suitable for finite element analysis. Instructions for
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 Triangle: A TwoDimensional Quality Mesh Generator and Delaunay Triangulator  Jonathan Richard Shewchuk, Carnegie Mellon University
A triangle that generates exact Delaunay triangulations, constrained Delaunay triangulations, and quality conforming Delaunay triangulations. The latter can be generated with no small angles, and are thus suitable for finite element analysis. Created
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 Triangles and Simplices (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on triangles and their higherdimensional generalizations (simplices), with a particular interest in partitioning regions into triangles, tetrahedra, or higher dimensional simplices, for various applications
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 Tricki  Gowers, Timothy; Sisask, Olof; and Frolkin, Alex
A wiki "repository of mathematical knowhow" that encompasses techniques ranging from the very general to those that concern particular subareas of mathematics. Browse problemsolving ideas by technique: for finding algorithms and algorithmic proofs,
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 Triogram Models  Hansen, Kooperberg, Sardy
An electronic version of a paper that introduces the Triogram method for function estimation using piecewise linear, bivariate splines based on an adaptively constructed triangulation. Java applets are included and a PostScript version of the entire paper
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 TSPBIB (Traveling Salesman Problem)  Pablo Moscato
A comprehensive listing of papers, source code, preprints, technical reports, etc., available on the Internet about the Traveling Salesman Problem (TSP) and some associated problems such as Fractal TSP Instances and VRP Instances, with links to software
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 TtH: a TeX to HTML translator  Ian H. Hutchinson
TtH translates TeX source that uses the Plain macro package, or LaTeX, into a near equivalent in HTML. It supports builtup fractions through HTML tables and mathematical symbols via the common extension tag [font face="symbol"] This enables semantically
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 TTMath  big online calculator  Tomasz Sowa
This big numbers library for C++ programming language performs mathematical operations with unsigned/signed integers and floating point numbers.
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 Turbulence, Chaos and Disordered Systems
A research group at the Eindhoven University of Technology in the Netherlands investigating turbulence, selforganization, chaos, and complexity in fluids. Descriptions of projects and full text of related thesis projects.
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 tutOR  Moshe Sniedovich and Angie Byrne
An online Operations Research (OR) tutorial system developing tutorial modules for specific OR topics, generic web tools to facilitate the construction of the OR modules, and research of the WWW technologies pertaining to this project. Modules for investigating
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 Twistors  What Are They?  Fedja Hadrovic
Notes briefly introducing the basic definitions of twistor theory, which might provide an "elegant formalism for both general relativity and quantum theory. Roger Penrose was first led to the concept of twistors in his investigation of the structure of
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 UC Berkeley Mathematics Department
Department info; a collection of the Berkeley [Ph.D.] preliminary exams; undergraduate study hints and survival guide; Notherian Ring (women in mathematics at Berkeley  includes WWW sites of interest to women mathematicians or grad students); Center
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