 01 Programming Benchmarks with Hidden Optimum Solutions  Ke Xu
Benchmarks with different problem sizes are provided, all of which are planted with hidden optimum solutions. It is expected, based on the study of phase transitions in NPcomplete problems, that the difficulty of solving these benchmarks will grow very
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 12 coins problem  Frans Faase
A classic math puzzle: given a balance scale and 12 coins, one of which is counterfeit and weighs less or more than the other coins, determine the counterfeit in 3 weightings, and tell if it is heavier or lighter. Extensions to other cases and the general
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 1991 Mathematics Subject Classification (MSC)  Chris Eilbeck; HeriotWatt University, Edinburgh
A hypertext version of the 1991 MSC. The main purpose of the classification is to help readers to find the items of present or potential interest to them as readily as possible  in MR, in Zbl, or anywhere else where this classification system is used.
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 Activity Group on Discrete Mathematics  Society for Industrial and Applied Mathematics (SIAM)
The SIAG on Discrete Mathematics focuses on combinatorics, graph theory, cryptography, discrete optimization, mathematical programming, coding theory, information theory, game theory, and theoretical computer science, including algorithms, complexity,
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 Algebra and Discrete Mathematics  Dr. Josip Hendekovic, Contact
Symmetries and Ordered Structures under the Influence of Model Theory and Combinatorics, a conference in Hattingen (near Essen), Germany, 26–31 July 2003.
Part of the Euresco programme and open to researchers worldwide, whether from industry or academia.
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 Algorithms and Ice Cream For All (MegaMath)  Nancy Casey; Los Alamos National Laboratory
Solve a city planning problem using mathematical graphs and algorithms. Students use algebraic methods to explore, model, and describe patterns and functions involving numbers, shapes, data, and graphs in problemsolving situations and communicate the
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 alt.math.undergrad  Math Forum
An unmoderated discussion forum for issues and problems pertaining to college undergraduate mathematics. Read and search archived messages; and register to post to the discussions.
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 Al Zimmermann's Programming Contests  Al Zimmermann
An "arena where demented computer programmers compete for glory and for some cool prizes." Computationally intensive problems, often involving heuristics, have included "Point Packing," "Retaining Water" (based on magic squares), "Son of Darts," "Topswops"
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 The American Mathematical Monthly (MAA Online)  Roger A. Horn, Ed., Mathematical Association of America (MAA)
The Monthly publishes articles, notes, and other features about mathematics and the profession. Its readers include professional mathematicians as well as students of mathematics at all collegiate levels. Authors are invited to submit articles and notes
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 AMOF: The Amazing Mathematical Object Factory  Frank Ruskey
Combinatorial objects are everywhere. How many ways are there to make change for $1 using unlimited numbers of coins of all denominations? Each way is a combinatorial object. AMOF is part encyclopedia and part calculator, a teaching tool that generates
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 Arbeitsgruppe Bachem/Schrader  University of Köln
A working group of the Center for Parallel Computing (ZPR) at Köln. Site includes a list of members and contact address; informative writeups on its projects, some in English. Topics include: Basic Research (meaning "pure" as opposed to "applied");
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 At Right Angles  Azim Premji University
Journal of math pedagogy and educational technology published since 2012. Issues come out in March, July, and November, with sections such as "In the classroom" (ITC) and Problem Corner, as well as topical features, book reviews, pullouts, and more.
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 A = B  Marko Petkovsek, Herbert Wilf, Doron Zeilberger
A=B, by Petkovsek, Wilf, Zeilberger, is a book about identities, especially identities involving binomial sums and hypergeometric identities, and ways to prove them using computer programs. The entire text may be downloaded from this site in PDF format.
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 Books: Professional & Technical: Professional Science: Mathematics  Amazon.com
Browse bestselling math books from the Professional and Technical Bookstore at Amazon.com, in such categories as Applied; Chaos & Systems; Geometry & Topology; Mathematical Analysis; Mathematical Physics; Number Systems; Pure Mathematics; Transformations;
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 Brendan McKay
Software includes nauty, a program for computing automorphism groups of graphs and digraphs, which can also produce a canonical labelling; and plantri, a program for generating planar triangulations. Also, skeptical treatment of claims made of miraculous
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 CADCOM: Committee for the Advancement of Discrete and Combinatorial Mathematics  Chris Rodger, Auburn University, USA (Chair)
An international committee formed by the Institute for Combinatorics and its Applications (ICA) to present Combinatorics and Discrete Mathematics in its best light to all interested people and agencies, including university administrations, industry,
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 Carpathian Mathematical Publications
Publishers of original research across math topics, as well as problembased and overview materials. Articles, which date back to 2009 and remain freely accessible online in English (some also in Russian or Ukrainian), have included "Left Noetherian rings
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 Center for Mathematical Talent  New York University
The Center for Mathematical Talent (CMT) at the Courant Institute of Mathematical Sciences coordinates activities for students in the New York City area who would like more mathematics than is included in the usual mathematics classroom. Freely downloadable
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 Centre for Discrete and Applicable Mathematics (CDAM)  London School of Economics and Political Science (LSE)
The Centre aims to bring together strands of mathematical work being carried out at the LSE and to raise the profile of mathematics in the social sciences, bringing together members from the departments of Economics, Mathematics, Operational Research,
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 Centre for Discrete Mathematics and Computing  Mathematics, Computer Science, Electrical Engineering; Univ. of Queensland, AU
A centre whose aim is to carry out and promote research and teaching in discrete mathematics and computing, and to facilitate collaborative research with groups working in related areas in Australia and overseas. The Centre publishes the Australasian
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 Centre for Discrete Mathematics and Theoretical Computer Science (CDMTCS)  Computer Science, Mathematics; Univ. of Auckland, NZ
A centre founded to support basic research on the interface between mathematics and computing, to foster research and development in these areas within the South Pacific region, and to create links between researchers in that region and their counterparts
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 Com2MaC: Combinatorial and Computational Mathematics Centre  Pohang University of Science and Technology, Korea
An integrated mathematical research center conducting research in various areas of mathematics and its applications relevant to the information and communication technology necessary for the nextgeneration industrial competitions. Basic research, educational
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 Computer Science Unplugged  Tim Bell, Ian H. Witten, and Mike Fellows, University of Canterbury, New Zealand
A free collection of activities designed to teach the fundamentals of computer science without requiring a computer. Because they're independent of any particular hardware or software, Unplugged activities can be used anywhere, and the ideas they contain
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 Cool Math Sites  Nina Heal
A links list in the following categories: puzzles, algebra, geometry, calculus, discrete math, statistics and probability, trigonometry and precalculus, books and reference, calculators and other technology, data, history, other links sites and internetbased
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 Counting to Calculus: Mathematics  William K. Bradford Publishing Co.
Math software, printed supplements, workbooks, textbooks, posters, and teacher tools available for Elementary, Middle and Secondary math curriculum.
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 CS22: Discrete Math  Brown University
An introduction to discrete math with a focus on proof, logic, proof by induction, cryptography and networks of processors: lessons, homework, solutions, and information. "Discrete mathematics" refers to the distinction between discrete sets (for example,
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 Database of Number Correlations  James Barton
Partitionings, prime factorizations, polygonal numbers, and other data about each of the numbers one through one thousand, as well as connections to "various material and occult phenomena." See also Barton's magic square that has interesting prime factor
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 David Sumner's Home Page  David Sumner
Study guides, exams, quizzes, problem sets, exam review materials, utilities, programs and simulations, syllabi, and other materials for courses such as calculus, sequences and series, graph theory, number theory and cryptography, and probability. The
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 Design Resources on the Web  Mathematics Research Center, Univ. of London
Links to webbased resources for design theory and related parts of discrete mathematics and statistics (coding theory, finite geometry, combinatorics, graph theory), with an annotated list of lecture notes and related links.
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 Developing Algebraic Thinking  Suzanne Alejandre
Teacher lesson plan and student kinesthetic activities on the Traffic Jam activity and applet, as originally published in the inaugural (Fall, 2002) issue of ONMath, an electronic journal of the National Council of Teachers of Mathematics (NCTM).
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 A Dice Game  Doug Ensley, Shippensburg University
In this game, two players roll dice repeatedly taking note of who has the higher roll each time. The original number of dice for each person and the number of rolls are set by the user. At the end, the percentage of wins for each player is displayed.
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 DIMACS  Rutgers & Princeton Universities, AT&T Bell Labs, BellCore
The Center for Discrete Mathematics and Theoretical Computer Science, an NSF Science and Technology Center. DIMACS is devoted to the development of the interrelated fields of discrete mathematics and theoretical computer science, among the most rapidly
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 Discrete Calculus by Analogy  Farzali Izadi, N. Aliev, G. Bagirov
"With origins stretching back several centuries, discrete calculus is now an increasingly central methodology for many problems related to discrete systems and algorithms. The topics covered here usually arise in many branches of science and technology,
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 Discrete Mathematics Graphic Calculator Series  O. T. Lee
A set of booklets written for the Year 12 Discrete Mathematics Programme of Western Australia, integrating the problemsolving process with specific graphic calculator models (Casio CFX 9850G/G+/GB+ and the Hewlett Packard 38G), and including programs
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 The Discrete Mathematics Project  Dominic Peressini; University of Colorado at Boulder
Archived resources from the collaboration of the UC Boulder School of Education and Department of Applied Mathematics. Activities sketch goals, abstracts, brief problem statements, instructor suggestions, suggestions for curriculum integration and further
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 Discrete Mathematics & Theoretical Computer Science (DMTCS): An Electronic Journal  Jens Gustedt
DMTCS is an electronic journal published by the Maison de l'Informatique et des Mathématiques Discrètes, MIMD. It is a peerreviewed publication devoted to rapid publication of innovative research which covers discrete mathematics and theoretical computer
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 discretemath  Math Forum
A discussion group for subject matter concerning teaching and researching of discrete mathematics at all levels. It began as a closed list for the researchers and educators who participated in the Rutgers University Discrete Math and Theoretical Computer
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 Discrete Math Problem of the Week (PoW)  Math Forum
Discrete math problems from a variety of sources, including textbooks, math contests, NCTM books, and puzzle books, and reallife situations, designed to reflect different levels of difficulty. From 1999 until 2002, this service challenged students with
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 Discrete Math Terms  Jennifer D. Jones, University of Oregon
A glossary of discrete math terms, from "and" and "absorption law" through "characteristic equation," "negation," and "recurrence relation," to "universal bound law" and "vacuously true." Available for navigation without frames.
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 Division by Zero  Dave Richeson
A blog about "math, puzzles, teaching, and academic technology." Posts, which date back to September of 2008 and sometimes introduce original applets, have included "Volumes of ndimensional balls," "Albrecht Dürer's ruler and compass constructions,"
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 Domino Artwork  Robert Bosch
Mathematical artwork of Bosch, who uses optimization techniques to create domino mosaics, flexible Truchettile mosaics, mapcolored mosaics, Traveling Salesman Problem (TSP) art, simpleclosedcurve sculptures, loops, labyrinths, and more. A professor
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 Don Knuth's Home Page  Donald E. Knuth, Stanford University
From the author of The Art of Computer Programming. "Computer Musings" chronologically documents Knuth's informal lectures at Stanford. It also links to Musings Online, digitized versions of videos from the lecture series that included Dancing Links;
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 Draft version of MSC2000  European Mathematical Society (EMS)
The proposed revision of the 1991 Mathematics Subject Classification (MSC), the classification used by the two reviewing journals Mathematical Reviews (MR) and Zentralblatt für Mathematik (Zbl) since the beginning of 1991. MSC2000 is the result of
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 Drawing Tools  Shai Duvdevani
A growing group of .NET C# programs intended to make life easier for highschool and university students studying subjects such as math, computers and electronics. Each of these programs features saving and loading, so that sharing a drawing of logical
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 Dr Mike's Math Games for Kids  Michael Hartley
Free printable and online math games for kids: traffic jam, times tables, magic square, magic hexagon, sugar sugar, Archimedean tilings, magical calculator birthday trick, and more. Newsletters include Monday Morning Math, with what math says about daily
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 Duke University Math Union  Jadrian Miles
The Duke University Math Union (DUMU) writes and hosts the annual Duke Math Meet. Download PDFs of problems and solutions from meets dating back to 1998.
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 Dynamic Labyrinths  Inge Schwank, Institute for Cognitive Mathematics, Department of Mathematics and Computer Science, University of Osnabrueck
Labyrinth construction sets to download or play online with Flash plugin.
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 Dynamic Web Tools Using webMathematica  Steve Wilson and Mike Martin, Johnson County Community College, Kansas
Interactive Web pages that allow students and faculty to compute and visualize mathematical results directly from a Web browser. Primarily for undergraduate courses, the pages are grouped by categories and a given page may be listed under several categories
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 Education: Mathematics  The Mining Company
Web resource lists of sites: see sciences  physical/computer and, beneath, mathematics by Kristin Matherly, with links to sites "in the spotlight" and topics: Algebra; Applied Math; Books; Business Math; Careers; Calculus; Communities; Competitions;
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 Egres Open  Tamás Király
A wiki forum for open problems in combinatorial optimization: colouring, cycles and paths, edgeconnectivity, integer polyhedra, matchings, matrices with indeterminates, matroids, nodeconnectivity, orientations, packing common bases, rigidity, stable
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