 Global Optimization  Loehle Enterprises; eNoteBooks Ltd.
A Mathematica package that provides a suite of tools for solving nonlinear optimization problems, as well as a variety of other applications such as finding the roots or zeros of a nonanalytic function.
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 Globewide Network Academy (GNA)
A worldwide nonprofit consortium of educational and research organizations for support of online courses and distance education. Its mission is to improve education by creating a marketplace for courses as well as to offer administrative and technical
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 Glossary  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A glossary of terms that also serves as an alphabetical index to Bogomolny's site. Each term is linked to an illustrated essay.
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 Glossary of Internet Terms  Matisse Enzer
An ongoing project, currently comprised of over 100 terms from ADM to digerati to Router to WWW.
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 Glossary of Mathematical Formulas  Keiichi Suzuki
This glossary of math terms and formulas, succinct enough for viewing on handhelds and other smaller screens, covers geometry, set theory, algebra, abstract algebra, trigonometry, vectors, matrices, calculus, complex functions, special functions, orthogonal
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 A Glossary of Statistics  Norman Marsh; Laboratory of Statistical Genetics, Rockefeller Univ.
In particular, rerandomisation statistics, organized alphabetically by letter, with in addition links to other statistics glossaries.
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 The GMAT Tutor  Matt Kirisits
TheGmatTutor specializes in tutoring services for the Math portion of the GMAT, Graduate Management Admissions Test. The site includes howto videos, strategy articles, and GMAT sample questions.
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 Gmsh  JeanFrançois Remacle, Christophe Geuzaine
A threedimensional mesh generator, primarily Delaunay, with builtin pre and postprocessing facilities, freely available for most UNIX platforms. Demo files and a short manual page are provided.
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 GN General Topology (Front for the Mathematics ArXiv)  Univ. of California, Davis
General 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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 GNU Octave  John W. Eaton, Dept. of Chemical Engineering, Univ. of Wisconsin
A highlevel language primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically. The site includes lists of updates, source and binaries, documentation (including
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 GNU Octave Repository
Custom scripts, functions and extensions to GNU Octave. Site includes alphabetical list of functions available for download and a related mailing list, with archives.
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 The Goal Angle Problem  Ken Koedinger
Two solutions to the following problem: as you are running down a soccer field with the ball, when is the angle subtended by the goal at its maximum? There is also a sketch illustrating a construction used in one of the solutions (quadrature of the rectangle).
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 Go Directly to JAIL!  Andrew Pinzler
The longterm probabilities in the Parker Brothers game Monopoly: an exploration into which Monopoly game board properties are occupied more frequently than others. Developed from a high school science project, this site is organized as a lab writeup.
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 God's Number is 20  Tomas Rokicki
An outline explaining how every Rubik's Cube™ permutation can be solved in twenty moves or fewer, established algorithmically by machine proof in July, 2010. Read "How did we solve all 43,252,003,274,489,856,000 positions of the cube?" and "What
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 The Gods of Sugarscape  Ivars Peterson  Science News Online
Computer simulations furnish a means of gleaning insights into human social and economic behavior. The Sugarscape model is more a metaphor than a realistic depiction of society, but by providing insights into population growth, resource use, migration,
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 GoKnow!  GoKnow, Inc.
GoKnow, Inc. intends to be the leader in technology pervasive, standardsbased, scientifically validated curriculum and educational tools. GoKnow offers tools for handheld devices' use in the classroom, professional development and consulting services.
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 Goldbach's Prime Pairs  Ivars Peterson (MathTrek)
Prime numbers serve as building blocks in the mathematics of whole numbers. Evenly divisible only by themselves and one, primes are a rich source of speculative ideas that mathematicians often find simple to state but difficult to prove. The Goldbach
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 The Golden ratio  MacTutor Math History Archives
Linked essay on the history of the golden ratio (golden number, golden section), from Euclid through Martin Ohm's book, Die reine ElementarMatematik. With references and other related web sites.
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 The Golden Section Ratio: Phi  Ron Knott
Contents: What is the Golden Ratio (or Phi)?  A simple definition of Phi, A bit of history; Phi to 2000 decimal places; Phi and the Fibonacci numbers  Another definition of Phi, A formula for Phi using a continued fraction, Rational Approximations
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 The Golden Section, Related to Music and Natural Sciences  Martin Morgenstern
An extended bibliography related to the golden section in music, mathematics, architecture, biology, etc. Articles and books are listed, and linked to Amazon.com or other sources for purchase where possible.
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 GoodQuestions Project  Dept. of Mathematics, Cornell University
The GoodQuestions project seeks to improve college calculus instruction by adapting two methods developed in physics instruction — ConcepTests and JustinTimeTeaching. GoodQuestions is a pedagogical strategy that aims to raise the visibility of the
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 Google
A search engine that analyzes the way Web pages are linked to one another and automatically generates lists of Web resources based on frequency of linking.
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 Google Calculator
Google's calculator feature evaluates math expressions. The google.com and the Google Toolbar search boxes now handle queries such as: 56*78, half a cup in teaspoons, (G * mass of earth)/(radius of earth ^ 2), and 1.21 GW / 88 mph. Google provides instructions
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 Google Groups Discussion: TINspire  Rex Boggs, moderator
For users of the TINspire handheld, Rex Boggs has set up a moderated discussion group at Google Groups. The purpose of the discussion is to share knowledge and problems to make the technology more productive, enjoyable and enlightening. If you are interested
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 Google Public Data Explorer  Google Labs
The Google Public Data Explorer is available for beta testing and comment. It is designed to make large datasets easy to explore, visualize and communicate. As the charts and maps animate over time, the changes in the world become easier to understand.
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 Google Scholar  Google Labs
Google Scholar is a subset of the larger Google search index, consisting of fulltext journal articles, technical reports, preprints, theses, books, and other documents. Use the Advanced Scholar Search to confine search results to engineering, computer
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 Googol+: Arbitrary Precision Calculator for Windows  Atelier Web
Arbitrary Precision calculator handlings a large range of operations from basic to advanced like factoring and continued fractions.
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 Googolplex  Frank Pilhofer
The American mathematician Edward Kasner once asked his nineyearold nephew to invent a name for a very large number, ten to the power of one hundred; and the boy called it a googol. He thought this was a number to overflow people's minds, being bigger
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 Gordon Royle's Homepage: Research  Gordon Royle
Catalogues and tables of interesting combinatorial objects: small graphs, cubic graphs, symmetric cubic graphs, vertextransitive graphs, Cayley graphs (by group), vertextransitive cubic graphs, cubic cages and higher valency cages, planar graphs, cubic
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 Got Math?  Dave Radcliffe
Blog by a community college math instructor and selfdescribed "GeoGebra fanatic." Posts, which date back to December, 2010, have included "Stacking cannonballs," "Counting with Integrals," "A Paradoxical Dissection," "Gelfand's Question," "Imagining
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 Government Affairs and Education (AMS)  American Mathematical Society
Government Affairs: news from Washington on science funding; calls for action; policy statements; recent statements by the mathematical community; federal budget information; how to contact Congress; science policy events; and a link to the AMS Committee
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 Government Communications Headquarters  Government Communications Headquarters, United Kingdom
British intelligence: take a brief, illustrated tour of GCHQ history through World War I, World War II and cracking the German Enigma code, the Cold War, and the post Cold War world; read about career opportunities for mathematicians and others; apply
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 Gowers's Weblog  Timothy Gowers
Blog by a Cambridge University professor interested in analysis, combinatorics, arithmetic combinatorics, and "general questions about mathematics, and how it is discovered and transmitted  hence this blog." Posts, which date back to September, 2007
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 Graceful Graphs  Michael Brundage, Dept. of Mathematics, Univ. of Washington
A paper about current studies on graceful labeling of graphs. Of particular interest is the conjecture that all trees are graceful graphs. Includes: definition of a graceful graph; methods of labeling graphs; how many graceful graphs are there?; known
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 GRACE: Graphical Ruler and Compass Editor  Hertzmann, Warren, Goldan, Felleisen; Dept. of Computer Science, Rice University
Interactive Euclidean Geometry: using a Java applet, this course focuses on a classical topic: the ruler and compass constructions of Euclid. GRACE allows the student to define constructions and their associated proofs interactively. This site contains
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 Grad Blog  American Mathematical Society
A "blog for and by math grad students." Posts, which date back to February, 2009, have included "Finding an Advisor," "Navigating Seminars — A First Year's Perspective," "Five Pieces of Advice for the Beginning Teaching Assistant," "Choosing a graduate
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 Graduate Programs in Mathematics Learning and Teaching  Drexel University
Drexel University’s online Master of Science in Mathematics Learning and Teaching represents a highly evolved synthesis of researchbased best practices and a collaboration between the School of Education’s leaders in the field of mathematics education
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 Graduate Recruitment and Actuarial Jobs  Hewitt UK
Graduate career opportunities and internships with Actuarial Jobs at Hewitt UK.
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 Graduate School in Your Future?  Dianne Prost O'Leary
Written by a former director of undergraduate studies attempting to smoothe the transition from undergraduate to professional, this document offers advice to students on entering, surviving, and thriving during graduate study and beyond. Graduate School
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 Graduate Tutor  GraduateTutor.com
Tutoring by professionals from various fields in math, statistics, statistical data analysis, and decisionmaking for business school students and working professionals. Currently topics include accounting, statistics, GMAT, GRE, business math, Excel
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 Grafbourse: Stock technical analysis and statistics
Applied, comprehensive, technical analysis and statistics. Simple decision making help. In English and French.
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 GrafEq Gallery  Pedagoguery Software
A gallery that demonstrates the visual range of graphs that can be produced using GRAFEQ graphing software, with a rogue's gallery of troublesome graphs. The archived graphs are possible because of the expressive power of general implicit relations. Each
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 Grafica Obscura  Paul Haeberli
An evolving computer graphics notebook: a compilation of technical notes, pictures and essays. Contents include: Paper and Plotter: A 3D Surface; Laser Cutting for Rapid Manufacturing; Geometric Paper Folding: Dr. David Huffman; Paper and Light (An inexpensive
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 Grand Illusions  Hendrik Ball
A "site for the enquiring mind, with optical illusions, scientific toys, visual effects, and even a little magic." Includes a number of feature articles on vision, photography, mirrors, optical toys, movies, etc. See, in particular, the geometrical optical
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 Grandma Got STEM  Rachel Levy
Levy, a Professor in the Mathematics Department at Harvey Mudd College, blogs to collect public awareness and art projects that use grandmothers' pictures, names, and connections to science, technology, engineering, and mathematics (STEM) in order to
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 Grant Keady
Grant Keady, an adjunct professor at Curtin University, researches fluid dynamics and related subjects, with forays into computer algebra. Some of his papers are available online in PostScript, gzipped PostScript, PDF, .dvi, or Mathematica notebook format.
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 Granular Volcano Group  Sebastien Dartevelle
The site aims to describe and understand granular flows, fluid dynamic, supercomputer modeling, grain features, and behaviors in volcanology. Includes descriptions of frictional, kinetic, and collisional rheologies of granular matter, and definitions
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 GraphCalc  Mike Arrison
A graphing calculator program for Windows. Features include threedimensional graphing, calculus, and statistics. Download a shareware version, read online documentation, request a feature, or read about the authors.
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 Graph Coloring Page  Joseph Culberson
An ongoing project to provide graph coloring resources. Contents include: Graph Coloring Bibliography; Graph Coloring Programs; Graph Generator Programs; Phase Transition in Coloring, with Data Files; Links to Other Sources; Links to Other Coloring Material;
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 Graphe Easy  Olivier Ansquer
Featurerich yet easytouse 2d graphplotting Windows software. Demo version available. It allows users to draw many graph types (Cartesian, polar, parametric coordinates) and many other graphs such as conics, integrals, inequalities, or sequences. It
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