 HumanComputer Interaction Group (HCI)  University of York (UK)
A group founded in 1984 to pursue research into the design and evaluation of interactive systems. Its interdisciplinary approach integrates rigorous formal methods from the latest software engineering research with theories of perception, learning, and
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 Humanistic Mathematics  Mathematics Education at The Math Forum
The idea that teaching, learning, and creating mathematics issues from the same psyche as literature, aesthetics, and music has attracted, since 1986, a worldwide network of people who share this belief. The existence of the Humanistic Mathematics Network
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 Humanity's Life Span (Math Chat)  Frank Morgan, MAA Online
Challenge: Estimate the life span of the human race. Answer: Al Zimmermann says with 80% confidence that we have between 100,000 and 10 million years to go.
Perhaps another million years is the best guess. (By comparison, the dinosaurs reigned for over
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 Human Research Program Education and Outreach Project  NASA  Johnson Space Center
This project strives to reach diverse communities, inspire a new generation of scientists and engineers, and encourage future space explorers. Browse all of its programs through the site above. One of the project's areas of focus is to develop supplemental
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 Hummer's Mind Reader  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Java simulation of a magic trick invented in the 1950s by the magician Bob Hummer. Choose one of three coins. Swap the other two, then swap as many pairs as you like. When you're done, the computer will announce your selection. The explanation includes
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 Hungarian Central Statistical Office (HCSO)
Introduction to and history of the Hungarian Central Statistical Office; Hungary in figures; important yearly data and most recent statistics; glossary of statistical definitions; catalog of publications; professional and scientific institutes; and detailed
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 Hunting e  Ivars Peterson (MathTrek)
Lagging far behind in the celebrity sweepstakes is the number known as e. Carried to 20 decimal places, e is 2.71828 18284 59045 23536. Only 50,000,817 of its decimal digits have been computed so far  though there are unconfirmed reports that 1 billion
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 Hunting for Higher Dimensions  P. Weiss  Science News Online
Experimenters test new theories suggesting that extra dimensions are detectable, not as small as predicted by string theory. Inspired by recent theoretical insights, physicists at accelerators and in gravitational laboratories are searching for clues
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 Hypatia  Taylor, Dawson; Dept, of Computer Science, Queen Mary & Westfield College, East End, London, UK
Hypatia is a searchable directory of research workers in Computer Science and Pure Mathematics, and a library of their papers. Contents: New papers, people, places and papers, bibliographies, useful links, Hypatia of Alexandria. Authors can be found by
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 Hyperbolic Geometry (Geometry and the Imagination)  Conway, Doyle, Gilman, Thurston; The Geometry Center
A closed polyhedron cannot be made by snapping together seven equilateral triangles so that there are seven at every vertex, but if you persist and continue to snap together seven triangles at each vertex, you will actually construct an approximate model
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 Hyperbolic Geometry (Graphics Archive, Special Topics)  The Geometry Center
A definition of hyperbolic geometry and illustrations of hyperbolic structures, with a link to Not Knot, a guided tour through computeranimated hyperbolic space.
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 Hyperbolic Geometry (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material in hyperbolic geometry, in which infinitely many parallels to a line can go through the same point.
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 Hyperbolic Geometry Using Cabri  Tim Lister
A site that provides documentation for drawing in the hyperbolic plane (noneuclidean geometry) using Cabri. As examples, it explains several concepts of hyperbolic geometry providing visualizations in the form of figures, animated gifs, and downloadable
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 hyperbolic surfaces  Gabriele E. Meyer
Photos of Meyer's fiber arts: Seifert surfaces, Poincaré disks, and other hyperbolic surfaces knit from yarn. For more of her fabric sculptures, visit http://www.math.wisc.edu/~meyer/airsculpt/hyperbolic1.html. Meyer, a lecturer in the Department
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 Hyperbolic Tessellations  David Joyce; Dept. of Mathematics & Computer Science, Clark University
The hyperbolic plane has more space in it then the Euclidean plane. There are only three regular tessellations of the Euclidean plane, namely {3,6} in which equilateral triangles meet six at each vertex, {4,4} in which squares meet four at each vertex,
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 Hyperbolic Tilings  Sascha Rogmann
A link to Rogmann's thesis (in German) and to pages on shells around the dodecahedron; 1+110+3458 cubes; hyperbolic buckyballs; hyperbolic animations; triangletessellations; quadrangletessellations; twoholed cloth torus; Subsets of PSL_2(Z[w]), D=3,
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 HyperCube  Harmen van der Wal
A stereoscopic 4D Java game in and around the hypercube (stereoscopism optional). The page also includes instructions on how to see in four dimensions, and how to see stereograms (read "rotated cubes" for "twisted cubes" in the 4D piece). See also Point
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 HyperCuber  Greg Ferrar
A Java applet that lets you rotate a fourdimensional cube in four dimensions. HyperCuber is a freeware program for 680x0based Macintosh computers that displays and rotates wireframe objects of arbitrary dimension, like hypercubes (fourdimensional cubes).
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 Hypergami (Geometry Forum Summer Institute)  Michael Eisenberg, Ann Nishioka
A program for the creation of paper sculptures of various types  particularly polyhedral models and the larger, multipart sculptures that can be created from polyhedra. Description of a Geometry Forum Institute program (summer 1995).
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 HyperMath  Carl R. (Rod) Nave; Georgia State University
HyperMath uses concept maps to explore mathematics ideas and applications to physics and astronomy. Originally developed in HyperCard, HyperMath covers the topics of algebra, trigonometry, geometry, vectors, linear algebra, logarithms, exponents, calculus,
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 HyperPhysics  Carl R. (Rod) Nave; Georgia State University
HyperPhysics uses concept maps to explore physics ideas and applications. Originally developed in HyperCard, the networklike environment provides for numerical exploration in the form of active formula and standard problems implemented in Javascript.
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 Hypersonic Aerodynamics Index  NASA Glenn Research Center
Primers, some with animations or Java applets, on hypersonic and high supersonic flows  when air molecules break apart, producing an electrically charged plasma around aircraft. Large variations in air density and pressure occur because of shock waves,
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 Hyperspace at UBC  University of British Columbia, Vancouver, Canada
Hypertextbased services for general relativity research from the University of British Columbia's general relativity and cosmology group. Information on the UBC GR group; Software for finding GR mail addresses; GR News Archives; Preprint searches; Classical
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 Hyperspace  International Society on General Relativity and Gravitation, QMW, University of London
A set of hypertextbased services for general relativity research from the QMW Relativity group (Queen Mary and Westfield College, Univ. of London). Software for finding GR (e)mail addresses; GR News Archive; Our GR related FTP archives; Preprint searches
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 Hyperspace Structures: Exploring the Fourth Dimension  Burbanks, Beardmore
Mpeg Movies and pictures illustrate: 1. The Hypercube: a 4 dimensional analogue of the cube. Details of its construction, along with movies of a spinning hypercube. 2. An "Inflated Hypercube": approximating the hypersphere. 3. Hypertorus: Adding together
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 HyperStat Online  David M. Lane; Rice Virtual Lab in Statistics
An introductorylevel hypertext statistics book. In addition to search capabilities, a glossary, analysis tools, and instructional demos, the book provides chapters on: describing univariate and bivariate data; introduction to probability; normal and
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 HyperTeX FAQ  Bhattacharya, Carlisle, et al.
HyperTeX is a defacto standard for inclusion of hyperlink information in TeX (and LaTeX) documents. Customized previewers for DVI and Postscript files exist which
enable the user to browse through hyperlinked TeX files just as one can browse normal HTML
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 Hypertext Help with LaTeX  Sheldon Green
LaTeX is a document preparation (wordprocessing) system widely used in the scientific community that processes an input file containing the text of a document with interspersed commands that describe how the text should be formatted. The crosslinked
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 Hypothèses / Géometrix  J. Gressier
Logiciel capable de corriger en direct un élève sur n'importe quel problème de construction géométrique. Il peut aussi le corriger sur la plupart des problèmes de démonstration en géométrie
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 IAEPedia  Information Age Education (IAE); The Science Factory
IAE, founded by Dave Moursund, is a nonprofit organization that provides free materials for preservice and inservice teachers. It focuses on improving education at all levels and throughout the world. The IAEPedia is a wiki page about its educational
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 IAmProximus.com: Study Smarter  the Smartacus Corporation
Learn business math, college algebra, precalculus, trigonometry, and more, through a library of interactive Flash (TM) tutorials designed for handheld PDAs that run the Palm OS. Free oneday trial (cancel after 24 hours or be charged the monthly rate),
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 Ian Stewart
News, books, and research by the science and science fiction writer and Emeritus Professor in the Mathematics Department at Warwick University, where he conducts research in nonlinear dynamics. "Goodies" include all 20 issues of the student mathematical
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 IASolver: The Brandeis Interval Arithmetic Constraint Solver  Timothy J. Hickey
A Java applet that uses interval arithmetic techniques to solve systems of nonlinear constraints. It includes a 'safe plotting' feature for plotting projections of the constraint set onto any two variables. The source code is also available.
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 iBerry Maths and Computer Science  Gordon Lockhart
iBerry assembles and coordinates information about open educational resources, including publicly accessible courseware, lecture notes, videos, slides, podcasts, exam questions, software, and demonstrations. See also iBerry's news aggregator and Learner
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 IBM ILOG CPLEX  International Business Machines Corp.
This mathematical optimization software features dynamic algorithm parameter control and postsolution information and analysis such as objective function value, solution variable and slack values, constraint dual values (shadow prices), bound sensitivity
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 I Choose Math  Justin Lanier
Blog by a high school teacher in Brooklyn Heights. Posts, which date back to August, 2011, have included "SBG: Affective Quizzing," "FreeChoice Time: Origins," "Introducing Proof Using Formal Systems," and "Math is Personal: A smOOC about Meaning, Sharing,
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 Icon Odds and Ends  Dept. of Computer Science, Univ. of Arizona
Icon is a highlevel, generalpurpose programming language with a large repertoire of features for processing data structures and character strings; an imperative, procedural language with a syntax reminiscent of C and Pascal, but with semantics at a
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 ICT in de wiskunde  Ivan De Winne
ICT in Mathematics is a math portal in the Dutchspeaking part of Belgium, with links to freeware, applets, and sites in Flanders and the Netherlands. In Dutch.
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 IDEA: Internet Differential Equations Activities  Thomas LoFaro; College of Sciences, Washington State Univ. (WSU)
Interdisciplinary computerbased activities for differential equations: a database of computer activities illustrating both mathematical concepts and the application of these concepts in a wide variety of disciplines. DynaSys, Java differential equations
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 Ideals, Varieties, and Algorithms  Cox, Little, O'Shea
An introduction to computational algebraic geometry and commutative algebra at the undergraduate level, with discussions of systems of polynomial equations ("ideals"), their solutions ("varieties"), and how these objects can be manipulated ("algorithms").
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 The Ideal Voting System (Math Chat)  Frank Morgan, MAA Online
Answering the challenge: What is the shortest line segment fencing off prescribed area 0 < A < 1 in a unit square? (What about the leastarea piece of plane dividing off prescribed volume 0 < V < 1 in a unit cube? What about a 4D cube?) ...assume
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 Identities for Linear Recurring Sequences  Kevin Brown
There are several methods for computing the Nth term (mod M) of a
linear recurring sequence of order d in log_2(N) steps, but most
such methods require d^2 full multiplications (mod M) per step.
The algorithm described below requires only d(d+1)/2
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 Ido Efrat
A mathematics professor at Ben Gurion University of the Negev in Israel. Site includes the syllabi for current courses and a list of Efrat's publications in abstract algebra, especially group theory. Some articles may be downloaded in PDF or DVI format.
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 IES ALGARB: departament de Matemàtiques
In Spanish: Página del Departamento de Matemáticas del IES ALGARB de Ibiza. Se facilita información académica, recursos, exámenes y ejercicios realizados durante el curso. Los alumnos tienen la posibilidad de anotar en la página sus propias preguntas.
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 iFD Bundle  iFD Software Consult
Five mathematical products for Pocket PC and Windows in one software package: iFD Geometry, iFD Graph, iFD Calc, iFD Formula, and iFD unit converter. All products available separately as well, in addition to other software applications.
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 I Feel the Need for Speed  Jeff Amerson
A rollercoaster lesson. Students learn to calculate the speed, velocity, acceleration, and inertia of a moving object and distinguish between distance and displacement. They also calculate the acceleration rates of the nation's fastest roller coasters.
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 iFigure
Links to online calculators and worksheets that provide information to help in planning, solving and making decisions for problems and tasks such as buying a home, investing money, figuring business profits, making statistical comparisons, or calculating
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 IFS Construction Kit  Larry Riddle
IFS Construction Kit is Windowsbased software that can be used to design and draw fractals based on iterated function systems. The program consists of three main windows. The IFS Window is where you can see and edit the code for the transformations that
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 IFS: Fractal Image Compression  Pulcini, Verrando, Meloni Rossi
Download IFS Application Framework, a freeware educational program for fractal image coding. Note: It needs 486DX2/66, 8MB RAM, Windows 3.1 with a 11MB swapfile and a 32000 SVGA driver (at least). Download IFSDOC, an introduction to IFS and IFSAF (in
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 If You Build It, Will They Come? Participant Involvement in Digital Libraries  Giersch, Klotz, McMartin, Muramatsu, Renninger, Shumar, and Weimar
A paper concerning a workshop involving representatives from several digital libraries with user participation. The workshop explored the ways users participate in digital libraries, and methods of studying these participants' interactions.
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