- (Not) Tiling a Triangle of Dots - Don West, Department of Mathematics, SUNY Plattsburgh
A triangular array of dots can never be tiled by three-in-line tiles, and
can be tiled by three-in-a-triangle tiles only if the size of the array is
congruent to 0, 2, 9, or 11 (mod 12). The author gives an elementary proof of these two results, not
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- NSDL Middle School Portal: Math Pathway - NSDL; the Ohio State University
A middle school portal into NSDL's math resources, browsable by topic, or choose a pre-selected set of resources on given subjects.
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- The Number of Latin Rectangles [PDF] - Peter Doyle
A paper that shows how to generate an expression for the number of k-line Latin rectangles for any k. The computational complexity of the resulting expression, as measured by the number of additions and multiplications required to evaluate it, is on the
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- Numberplay - The New York Times
Mathematical, logical and scientific puzzles, with solution "recaps." The posts, by Gary Antonick and Pradeep Mutalik, have included "Surreal Hat Tricks," "The Puzzles of Pickover," "Prime Rib at Hogwarts," "Nim for (a) Change," "Phi - The Magic and the
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- On-line Dictionary of Combinatorics - Joe Fields
An on-line dictionary of combinatorics by a doctoral student at the University of Chicago. The dictionary is navigable by letters of the alphabet, and contains a few illustrations. Entries range from Abelian to Zorn's Lemma, and include several resources
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- OpenMathText.org - David A. Santos, Alain Schremmer
OpenMathText.org is a depository of free, downloadable texts and is primarily dedicated to the specification, development, and dissemination of free, editable and downloadable mathematical texts aimed, mainly, at "just plain folk." OMTo invites registrants
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- Other Maths - Jon Perry
Notes, applets, and proofs on a variety of open problems and conjectures: roots of x^p, highest power of 2 that divides ab + bc + ca, a prime product paradox, consecutive integers, (n + 1)!, Collatz, n-secting a line, the first lower digit, Fibonacci,
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- PAX Puzzle - PAX Puzzle
Wooden puzzles, rope puzzles, puzzles boxes, and board games for sale. Recommendations and gift sets available.
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- PBS Teachers: Math - PBS Teachers
The Public Broadcasting System's Math Service, combining computing and telecommunications technologies to offer interactive data services and interactive video and voice services for education based on the NCTM Standards. The site features: resources,
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- Peanut Software for Windows - Rick Parris
Abstracts and links for downloading free mathematics software: Wingeom (high-precision geometric constructions); Winplot (general-purpose plotting utility); Winstats (scatter plots, curve fitting, histograms, statistical data, and standard theoretical
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- Peter Ash's Thoughts on Math and Education - Peter Ash
Musings on doing and teaching mathematics, book reviews, and math problems both elementary and advanced from the creator of Cambridge Math Learning. Blog posts, which date back to August of 2007, include "Very Proper Fractions"; "Physical Models for Non-Euclidean
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- Peter Doyle - Mathematics, Univ. of California at San Diego
Advanced tutorials, proofs and papers, mostly statistics, probability, geometry, and graph theory, but with examples from other mathematics areas as well. Don't miss Dr. Doyle's Flip Flops.
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- Powell's Books
Located in Portland, Oregon, USA; the largest independent bookseller in the United States, specializing in technical books and new, used, hard-to-find, and antiquarian titles. An extensive subject and keyword list is available - search database of titles,
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- Powersums, Fermat, Waring; Quotes, History... - Nico F. Benschop
Links to papers on the ideas of Fermat, Waring, Goldbach, Cantor, Hensel, Hasse-Minkowski, and Selmer, and the following mathematical concepts: semigroups, sequential logic synthesis, cubic roots, and state machines and their sequential closure. With
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- PreCalculus Problem of the Week - Math Forum
Math problems for students who had finished studying topics commonly covered in first-year algebra and high school geometry. From 2002 to 2003, problems involved probability, statistics, discrete math, and trigonometry. The goal was to challenge students
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- Principles and Practice of Constraint Programming: Conferences - Department of Computing Science, Univ. of Alberta, B.C.
Links to previous and future conferences concerned with all aspects of computing with constraints including: algorithms, applications, environments, languages, models, systems. Contributions are welcome from any discipline concerned with constraints,
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- Problem of the Week - Elgin Johnston, Department of Mathematics, Iowa State University of Science and Technology
Download PDFs of challenging problems in number theory, abstract algebra, graph theory, and other topics every Monday. Intended for undergraduate students enrolled at Iowa State University: "Solvers of each week's problem will be listed on the Problem
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- Problem of the Week - Pavel Belik, Augsburg College
Weekly challenges, posted for undergraduates at Augsburg College, that run the gamut from number theory to geometry and beyond.
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- Problems in Topological Graph Theory - Dan Archdeacon
An ongoing list of open questions in topological graph theory, to which the author invites contributions. Classical questions on genus; coloring graphs and maps; drawings and crossings; paths, cycles, and matchings; symmetries; locally planar embeddings;
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- Problems of the Week - Math Forum @ Drexel
Our goal with the Problems of the Week is to engage students in non-routine, constructed-response mathematics investigations that integrate writing with problem solving in the math classroom. In addition to the Current PoWs and the Problems of the Week
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- Professional Development Programs for Grade K-12 Teachers of Mathematics - The State University of New Jersey - Rutgers
Read about and apply for summer institutes such as Institutes for New Teachers of Mathematics and Science, Helping All Students Succeed in Grades 7-12 Mathematics, the Leadership Program in Discrete Mathematics, and the DIMACS Connect Institute; conferences
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- The Progress Report - Dan Lemay
A web log where the author shares successes, concerns, and commentary about teaching math to high school students.
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- Project Welcome (Web Educator's Library Collection of Mathematical Explorations) - MAA (Mathematical Association of America)
Interactive mathematical programs in a newly developed, Java-based interface.
Download online or offline versions of the player. Twenty lessons, with summaries, include "Best Linear Fit," "Limits of Functions," "Piecewise Functions," "Nonlinear Equations,"
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- Puzzles - Martin Watson
Blogs, comments, musings, design sketches, and photographs of mechanical puzzles by an avid collector and craftsman. Puzzle news, the author's own burrs (Watson's wormhole, digigrams, Dutch cubist), in-depth explorations of manipulative puzzles (Puzzles
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- The Puzzle TOAD - Tom Bohman, Oleg Pikhurko, Alan Frieze, and Danny Sleator, School of Computer Science, Carnegie Mellon University
Send the authors your solutions to their challenging graph theory, number theory, geometry, discrete mathematics, logic, and other puzzles. Re-visit periodically to see the latest question, and download PDFs of solutions of past problems.
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- Quandaries and Queries (Math Central) - Dept. of Mathematics and Statistics, University of Regina, Saskatchewan, Canada
A math Question and Answer area for K-12 students and teachers, with searchable archives of past questions and answers.
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- Query Interface to the Contents of the Mathematics Archives - University of Tennessee, Knoxville (UTK)
Search software, abstracts and reviews; teaching materials, etc. by keyword.
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- Random Structures and Algorithms - John Wiley & Sons, Inc.
A journal that publishes results concerning random graphs, hypergraphs, matroids, trees, mappings, permutations, matrices, sets and orders, as well as stochastic graph processes and networks, with particular emphasis on the use of probabilistic methods
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- Rectilinear Geometry (The Geometry Junkyard) - David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on geometric problems defined on squares and rectangles, higher dimensional boxes, cubes, and hypercubes, right triangles and other right-angled figures, and "taxicab geometry" in which distances are measured
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- Resources for Discrete Math - Center for Discrete Mathematics and Theoretical Computer Science (DIMACS)
A collection of course syllabi, textbooks, and related materials for discrete math in undergraduate curricula.
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- Revathi Narasimhan - Department of Mathematics, Kean University
College Math, College Algebra, and Calculus course resources and links include Narasimhan's own Interactive Calculus tutorial, which requires the LiveMath plug-in. See also Using Excel in Finite Math and Applied Calculus, freely downloadable Excel workbooks
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- The Roman Press, Inc. - Steven Roman
Home page of a California mathematics professor, including research articles, books and textbooks, and software.
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- RU Search Engine - Rutgers University
Search all sites in the Rutgers domain, including DIMACS, by keyword.
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- Samuel Arbesman
Research and writings by the author of The Half-Life of Facts. As an applied mathematician and network scientist, Arbesman's delves into the science of science, nature of productivity and prosocial behavior within cities, the structure and function of
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- Science and Math Initiatives (SAMI)
A database/clearinghouse of resources, funding, and curriculum for rural math and science teachers. List, search by title or description, or browse math resources by category. Originally a project of the Boulder Valley School District, Boulder, Colorado,
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- Science News for Kids - Science Service
Science articles written for kids, along with activities for kids to try on their own and ways for kids to comment, ask questions, or submit their own work through the site. Also includes: brain teasers and Java-based games; science fiction discussions
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- SCORE Mathematics Lessons - Jim Shaver, Schools of California
Lessons by teachers that reflect California's Mathematics Framework and the NCTM Standards, organized by their main strands with links to descriptions of the strands: Functions, Algebra, Geometry, Statistics and Probability, Discrete Mathematics, Measurement,
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- Search Ask Dr. Math Archives - The Math Forum
Search by keyword K-12 math questions answered by volunteer 'math doctors' in the U.S. and abroad.
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- Search for Math on the Internet - The Math Forum
Keyword search of all searchable archives, Newsgroup archives, Dr. Math archives, Problems of the Week, Internet Math Library, or any combination thereof.
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- Seedbed - Tom O'Brien, ed.
Throughout the 1980s, Seedbed published articles on "the intellectual growth of children, and teachers' participation therein." Editor Tom O'Brien described the publication as a practical one, "where teachers are the principal authors and where teachers'
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- Series Simulator - Doug Ensley, Shippensburg University
A program that allows you to use a random number generator to simulate a series
with parameters specified by you.
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- SF, posets, and coxeter/weyl - John Stembridge
This is a group of combinatorics Maple packages for Unix and Mac operating systems, specifically for studying symmetric functions, partially ordered sets, root systems, and Lie algebras.
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- SHAREWARE.COM - CNET, Inc.
Search more than 250,000 files in the former Virtual Software Library: first select the platform of your choice, then enter the word or filename to search for. You may also search for files in a specific archive here by first selecting the archive of
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- SIAM Activity Groups - Society for Industrial and Applied Mathematics
Activity Groups on: Control and Systems Theory; Discrete Mathematics; Dynamical Systems; Geometric Design; Geosciences; Linear Algebra; Optimization; Orthogonal Polynomials and Special Functions; Supercomputing, etc. Rules of Procedure, Initiation and
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- SIAM Journals - Society for Industrial and Applied Mathematics
The journals of the Society for Industrial and Applied Mathematics (SIAM): Applied Mathematics; Computing; Control and Optimization; Discrete Mathematics; Mathematical Analysis; Matrix Analysis and Applications; Numerical Analysis; Optimization; Scientific
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- Sites with Problems Administered by Others - Math Forum
Problems of the week or month: a page of annotated links to weekly/monthly problem challenges and archives hosted at the Math Forum but administered by others, and to problems and archives elsewhere on the Web, color-coded for the level(s) of the problems
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- Sketch Exchange - Key Curriculum Press
Share Sketchpad activities, tips, questions, and ideas in this online community dedicated to the dynamic geometry software. Browse sketches by grade level, topic, or tags.
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- SMART: Science and Mathematics Advancement and Resources for Teachers - Los Angeles Educational Partnership
A program designed to help teachers in Los Angeles County (California, USA) develop their professional teaching skills and content knowledge. Links for Teachers, Students, Businesses and Institutions, Parents, and Community Members. Includes the SMART
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- Software (Mathematics Archives) - University of Tennessee, Knoxville (UTK)
An extensive collection of links to software, with abstracts and reviews, organized in four different ways: by platform (Macintosh, MSDOS) and then by subject; interactive texts (using a commercial package such as Mathematica, Maple or Mathkit to interact
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- Some Materials for Discrete Mathematics - E. Lee Lady, University of Hawaii
Files in PDF, DVI, and Postscript format. Contents include: an algorithm for solving linear Diophantine equations, the Chinese remainder theorem, mathematical induction and recursive algorithms, Change of base to Cantor representation, Dijkstra's algorithm
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