 Gene Abrams
Beamer files for seminars and colloquia on Leavitt path algebras, and activities related to mad veterinarian puzzles": "The Graph Menagerie: Abstract Algebra meets the Mad Veterinarian"; "The Graph Menagerie: Abstract algebra and the Mad Veterinarian"
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 General Algebraic Modeling System  GAMS
A highlevel modeling system for mathematical programming problems. It consists of a language compiler and a stable of integrated highperformance solvers. GAMS is tailored for complex, large scale modeling applications, and allows you to build large
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 Generalized Logistic Equation  Douglas J. Ingalls
A logistics equation is one of the simpler chaos equations. This site explores the property of the general equation with respect to immigration/emigration of the world's population. Includes graphs and a QBASIC program for generating logistic graphs.
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 General LeastSquares  Direct Solutions and Bundle Adjustments  David Manthey
The general least squares process can be used to solve a set of equations for a set of unknowns. The only requirement is that there are at least as many equations as there are unknowns. This paper (in html and PDF formats) provides a new description of
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 General Mathematics, AM (Funk & Wagnalls Multimedia Encyclopedia)  Lycos Zone: Mathematics
Short articles on basic mathematics, including biographical information about mathematicians, from the abacus to Gaspard Monge.
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 General Mathematics, NZ (Funk & Wagnalls Multimedia Encyclopedia)  Lycos Zone: Mathematics
Short articles on basic mathematics, including biographical information about mathematicians, from John Napier to Zeno of Elea.
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 General Register Office for Scotland
The department of the United Kingdom that registers births, marriages, deaths, divorces and adoptions in Scotland, and carries out periodic censuses of Scotland's population. Tables of "vital information," population data, and common names may be found
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 General Relativity  MacTutor Math History Archives
Linked essay describing the history of general relativity from Aristotle's notion of the motion of bodies through Lorentz and Einstein in the 20th century, with 29 references (books/articles).
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 Generating Functions  Interactive Mathematics Miscellany and Problems, Alexander Bogomolny
The definition and properties of generating functions with several examples, including variants of coin change, fast algorithm for computing Banzhaf and ShapleyShubik power indices, covering the chessboard with tromino and more. Many examples are illustrated
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 Generic Two integer variable equation solver  Dario Alpern
Java/JavaScript code that solves Diophantine equations of the form Ax^2 + Bxy + Cy^2 + Dx + Ey + F = 0 in two selectable modes: solution only and stepbystep (or teach) mode. With a link to his description of the solving methods.
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 A Genetic Algorithm  Harold Brochmann
Genetic algorithms are computer programs that model evolution and natural selection in looking for 'good' solutions to problems that do not have a prescribed solution procedure. This article describes the output of a demonstration GA program.
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 Genetic Algorithms Archive  Alan C. Schultz, Naval Research Laboratory
A repository for information related to research in genetic algorithms. Contents include: Calendar of ECrelated events; GAList Archive: back issues, source code, information; Links to other GArelated information; Links to EC research groups' home pages;
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 The Genome Multimedia Site  Brandeis University
An interactive course that introduces how some concepts of probability theory (combinatorics, mutation), information theory (bit definition, entropy), alignment theory (programming, scoring, matrices), and statistics (populations and samples, histograms,
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 A Gentle Introduction to Category Theory  the calculational approach  Maarten M. Fokkinga; Dept. of Computer Science, University of Twente, The Netherlands
Lecture notes introducing some important notions from category theory, in particular adjunctions. Proofs are given in a calculational style, and the (few) examples are taken from algorithmics. Download the full text in postscript format.
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 Genuine Fractals Software  Altamira Group, Inc.
Genuine Fractals™ plugins for Adobe Photoshop and compatible image editing programs enable highquality digital photo enlargements and artwork at various sizes and resolutions from the same low to mediumresolution originals. Stepbystep instructions
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 GeoCalc  BaldGeeks
Macintosh shareware for calculating the area, perimeter, sides, angles, and other measures of two and threedimensional shapes such as ellipses, rectangles, triangles, trapeziums, parallelograms, polygons, prisms, cylinders, cones, pyramids, and spheres.
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 GEO Gateway  NASA, John C. Stennis Space Center
A portal to information about Geographical Information Systems, Global Positioning Systems, and remote sensing. Sections for teachers, students, and professionals, as well as a barebones facts section for everyone. A National Workforce Development Education
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 GEOLAB WWW Server  NASA Langley Research Center GEOmetry LABoratory
Home surface modeling and grid generation. In engineering analysis, a critical component of the numerical solution process is the development of a discrete representation for the physical domain of interest. This discretization into surface and volume
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 GeoLib: C++ and C# Computational Geometry Library  Matthew Minor, GeoLib
C++ and C# library with help and explanations for all agorithms and concepts used. Demo versions available.
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 The Geomaths MathHelp material  University College London (UCL)
Part of the Interactive Mathematics and Geoscience Education (IMAGE) project, Geomaths MathHelp provides mathematics selfstudy material embedded within the geological sciences. MathHelp "notebooks" cover specific mathematical topics accessed through
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 Geomet3D  JuanCarlos CriadoAlamo
Geomet3D is an analytic geometry program in 3D. You can plot points, vectors, lines, and planes; and do basic analytic geometry operations with them.
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 The Geometer's Sketchpad Bibliography  Key Curriculum Press
This bibliography lists publications that concern the software application the Geometer's Sketchpad, Dynamic Geometry in general, and the mathematical and educational contexts in which they are relevant: research, reviews, and applications.
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 The Geometer's Sketchpad: Classroom Resources on the Web  Math Forum
A page of links to dynamic interactive geometry resources for Sketchpad. GSP at Key Curriculum Press; classroom introductions and tutorials; courses, classroom materials, and student work; and general information. See also Sketchpad Resources at the Math
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 The Geometer's Sketchpad: Classroom Resources  The Math Forum
Sketchpad and JavaSketchpad dynamic interactive geometry resources on the Math Forum Site: sketches, activities, and tours; MAA meetings and groups with presentations and sample sketches; Forum Sketchpad Web Units (Algebra & Calculus; Vectors; Morphing
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 The Geometer's Sketchpad  Key Curriculum Press
Geometry software for Euclidean, coordinate, transformational, analytic, and fractal geometry, recommended for students from grade 5 through college. Developed for geometry, students now also use Sketchpad's flexibility and reach to explore algebra, trigonometry,
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 The Geometer's Sketchpad Resource Center  Key Curriculum Press
Search collection of Sketchpad Classroom Activities for download or purchase, browse the Advanced Sketch Gallery, access Technical Support, explore some online JavaSketches created with Sketchpad, and find links to others' sketches and related resources.
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 The Geometer's Sketchpad  Ross Isenegger, Atomic Learning, Inc.
Quicktime movie tutorials to learn how to use Sketchpad. Sample "Getting Started" for free. Purchase a subscription to get tutorials on using the construction menu, using the measure menu, changing the display, coordinate geometry, transformations, creating
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 The Geometer's Sketchpad: Three Labs  Mike Riedy
Four sketches about rotation and translation, the cycloid, and the areas of a parallelogram and a triangle, with directions for making them.
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 Geometría con Cabri II  Jose Manuel Arranz
Applets para construcciones básicas, triángulos, cuadriláteros, polígonos regulares, circunferencia, movimentos en el plano, geometría en la mesa de billar, puzzles geométricos, y demostraciones de la teorema
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 Geometria Fractal Geometry  Jaume Domenech
Fractal geometry basics, including links to biographies and software, plus a collection of articles, mostly in Spanish, some in English.
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 Geometrica: a Mathematica package for Geometry  eNoteBooks Ltd.
Used by mathematics educators, researchers, and graphical designers,
Geometrica is a Mathematica application for exact drawing and geometry. With
it, you can draw points, lines, circles, ellipses, parabolas, hyperbolas,
and more, as well as determine
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 Geometrical Dimensional Analysis: Map of Physics  John Aikman
A text article and a tutorial, with references and links. Familiar equations and formulas of physics arranged into 3D structures create concept maps of the system of units and a potential for superformulas: more powerful formats for use of existing mathematical
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 Geometric Algorithms  Susan Landau; Univ. of Massachusetts at Amherst
Landau's interest in geometric algorithms has been in problems of an algebraic flavor: computeraided design, robotics, and other geometricrelated applications that have created a need for methods for embeddings, visualization, and algorithms for construction
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 Geometrical relations for Circles, Spheres, and Cylinders  Tom Solomon, Bucknell University
Diagrams and mathematical equations relating to these simple geometric shapes.
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 Geometric Arts  Ghee Beom "Quincy" Kim
A site dedicated to geometry and visual perception: patterns, fractals, structures, rotations, spirographs, optical arts, knots, and more. Some constructions include the artist's reflections, instructions, and links to related sites and interactive applets.
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 Geometric Constructions  G.E. Martin; SUNY at Albany, Albany, NY
A book that offers a comprehensive introduction to geometric constructions in the classical sense, combining purely mathematical, historical, and philosophical arguments and viewpoints. Contents include: Euclidean Constructions; The Ruler and Compass;
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 Geometric Construction with the Compass Alone  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Information and exercises about geometric constructions: almost everything you can do with a ruler and a compass you can do with the compass alone.
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 Geometric Loci
Pictures and animations of mathematical curiosities. Posts, which date back to January, 2014, have included Reuben Thomas iris, the trammel of Archimedes, Möbius hanger, polyhedron drilled pentagonal rotunda, and il triangulo Sierpinski secondo Dimitri.
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 Geometric Models (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material describing physical objects corresponding to geometric constructions (and methods for creating such objects), particularly polytopes.
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 Geometric Sculpture  Elias Wakan
Sculpture inspired by a love of geometric form.
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 Geometric Sculpture  George W. Hart
Geometric forms from the author of Multidimensional Analysis and the Encyclopedia of Polyhedra. As a sculptor of constructive geometric forms, Hart's work deals with patterns and relationships derived from classical ideals of balance and symmetry. He
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 Geometric Tools, Inc.  Dave Eberly
Download source code of Wild Magic RealTime 3D Graphics Engine. Geometric Tools, Inc., provides contract programming services in the areas of computer graphics, image analysis, and numerical methods.
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 Geometric Topology (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material in an area of mathematics that concerns the assignment of geometric structures to topological spaces, so
that they "look like" geometric spaces. For instance, compact twodimensional surfaces can have
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 Geometros
Makers of the CAD system SolidGraph, built on sgCore, a solidstate modeling library that allows programmers to add CAD system functionality to their programs. Read product reviews; get plugins; post to support forums and consult FAQs; see lessons, examples,
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 Geometry Algorithms  Dan Sunday, softSurfer
Resources for developing geometry algorithms and computer graphics software: overviews, histories of geometry, a gift shop, and more. The archive of algorithms includes areas of triangles and polygons; lines and distances of a point to a line; fast winding
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 Geometry and the Imagination  Conway, Doyle, Gilman, Thurston; The Geometry Center
A collection of handouts for a twoweek summer workshop entitled 'Geometry and the Imagination', led by John Conway, Peter Doyle, Jane Gilman and Bill Thurston at the Geometry Center in Minneapolis, June 1728, 1991. The workshop was based on a course
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 Geometry and Topology Journal  Mathematics Institute, University of Warwick
A fully refereed international journal, published in free electronic format and a paper version, dealing with all aspects of geometry and topology and their applications. The site offers main journal papers (in PostScript and PDF formats), research monographs,
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 Geometry and Topology: Recent Papers 19891993  Univ. of Melbourne, Australia
A bibliography of eprints from the Dept. of Mathematics and Statistics, Univ. of Melbourne, Australia.
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 geometryannouncements  Math Forum
A discussion group accessible as a Webbased discussion, a mailing list, or a Usenet newsgroup, for information about lectures, announcements, special meetings, and upcoming events concerning geometry. Read and search archived messages; and register to
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 The Geometry Applet  David Joyce; Dept. of Mathematics & Computer Science, Clark University
A Java applet used to illustrate Euclid's Elements  an illustration from Euclid's Elements Book I Proposition 22. Another example using this Geometry Applet illustrates the Euler line of a triangle. Version 2.0 does threedimensional constructions, whereas
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