 Amortization Schedule
JavaScript calculators for figuring out loan amortizations, investment fees, debt payoffs, savings, timesheets, and tips; for simulating investments; and for comparing savings rates and mortgages.
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 AMPL: A Modeling Language for Mathematical Programming  Bell Laboratories
A comprehensive and powerful algebraic modeling language for linear and nonlinear optimization problems, in discrete or continuous variables. AMPL lets you use common notation and familiar concepts to formulate optimization models and examine solutions,
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 AMS Bookstore  American Mathematical Society
A searchable catalog of over thousands of books, videos, journals, software and gift items from the AMS and participating publishers.
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 The Analemma 
Bob Urschel, Valparaiso, IN
The figure8 path that the sun makes in the sky is called the analemma. This site explores the paths of the sun and the earth, with investigations into the effects and the math of their elliptical orbits and earth's tilt, and a summation.
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 Analog Gadgets  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Java simulations of analog gadgets. Includes an analog device simulation for drawing ellipses, a Peaucellier Linkage simulation, an angle trisection demonstration, a demonstration/essay on cycloids, and applets on geoboards (with a proof of Pick's Theorem)
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 AnalyCorp
XLSim, analytical business modeling in Excel; INSIGHT.xla, software for Monte Carlo simulation, forecasting, and optimization, with seminars in the application.
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 Analysis & Knowledge  Sanford Aranoff
Download data analysis software, such as Patterns, which analyzes and charts trends in stock market using Andrews concepts. See also this former Rutgers University physics professor and current high school educator's thoughts on teaching and help file
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 Analysis  Math Forum
Links to some of the best Internet resources for analysis: Web sites, software, Internet projects, publications, and public forums for discussion.
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 An Analysis of the Job Market for Mathematicians  Geoff Davis
Draft of a paper on the mathematics job market, submitted to the Notices of the AMS. It contains: a comprehensive overview of current labor market conditions for mathematicians; a simple model of the supply process that predicts the observed 10 year oscillations
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 Analysis WebNotes  John Lindsay Orr; Dept. of Mathematics & Statistics, Univ. of NebraskaLincoln
An extensive collection of analysis resources, including class notes, discussion boards, and homework assignments, with questions and answers from analysis labs, and techniques of proofs. There are interactive demonstrations of several central themes
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 The Analyst  George Berkeley
A text based on the 1898 edition of the works of George Berkeley, edited by George Sampson, incorporating a small number of changes. Many mathematicians published replies to Berkeley's attack on contemporary mathematical practice in The Analyst. Included
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 The Analytical Engine  John Walker
The mathematician Charles Babbage designed an Analytical Engine, a mechanical precursor to the computer, in the late 1800s. Read historical documents related to the Engine, including Blaise Pascal's account of his mechanical adding machine (in French),
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 The Analytical Group, Inc.
A site that offers a full range of tabulation and statistical services; survey centers, and interviewing and tabulation software: including Query/WinQuery computeraided telephone and personal interviewing (CATI) software, and WinCross, advanced crosstabulation
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 Analytic and Descriptive Geometry  Dave Rusin; The Mathematical Atlas
An introduction to ordinary analytic geometry as studied in secondary school. (Also included here is a rather lengthy analysis of a result known as Poncelet's Porism.) History; applications and related fields and subfields; textbooks, reference works,
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 Analytic Cycling  Tom Compton
Software that provides technical methods for evaluating and estimating cycling performance and parameters. It makes extensive use of differential equations and advanced numerical methods.
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 Analytic Geometry: Cylindrical Coordinates (Ask Dr. Math FAQ)  Math Forum
A discussion of cylindrical coordinates and their common uses.
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 Analytic Geometry Formulas  Math Forum; Ask Dr. Math FAQ
Analytic geometry (a branch of geometry in which points are represented with respect to a coordinate system, such as cartesian coordinates) formulas for figures in one, two, and three dimensions: points, directions, lines, triangles, polygons, conic sections,
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 Analytic Geometry: One Dimension  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in one dimension: points, general quadratic equations, and circles.
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 Analytic Geometry: Polar Coordinates (Ask Dr. Math FAQ)  Math Forum
A discussion of polar coordinates, and formulas for points, directions, translations, rotations, lines, triangles, and conic sections in polar coordinates.
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 Analytic Geometry: Spherical Coordinates (Ask Dr. Math FAQ)  Math Forum
A discussion of spherical coordinates and their common uses.
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 Analytic Geometry: Three Dimensions  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in three dimensions: points, directions, lines, planes, triangles, tetrahedra, general quadratic equations and quadric surfaces, and spheres.
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 Analytic Geometry: Two Dimensions  Math Forum; Ask Dr. Math FAQ
Formulas for analytic geometry figures and concepts in two dimensions: points, directions, lines, triangles, polygons, conic sections, and general quadratic equations.
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 Andrei Nikolaevich Kolmogorov  Alexander Adamchuk
Curriculum vitae, biography, conference announcement, memorial readings, and links about Andrei Nikolaevich Kolmogorov.
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 Andy Norton's Web Page  Dept. of Mathematics Education, Univ. of Georgia
Illustrated essays and explorations of algebra and geometry using various technology, including TI85 calculators, CBL's and computer software such as Geometer's Sketchpad (with sketches to download), Algebra Expressor, and Excel, by a grad student in
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 The Angle Bisectors  Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
A discussion of why the anglebisectors of a triangle meet at the incenter of the triangle, in several different ways, involving: cevians, the transitivity property of equality, axes of a 2line, altitudes and orthic triangles, and complex numbers.
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 AngryMath  Daniel R. Collins
Blog by an adjunct math lecturer at Kingsborough Community College who believes that "Math is a battle. It is a battle that feels like it must be fought ...," and for whom "math isn't beautiful or fun, but it is powerful, and that's what we need from
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 The Animated Telegraph Equation  Joel Feldman; Department of Mathematics, Univ. of British Columbia, Vancouver, BC, Canada
An applet illustrating the behaviour of solutions of the telegraph equation.
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 Anisohedral Tilings Page  John Berglund
Tilings and tessellatings with 2anisohedral and other isohedral tilings. With explanations and a bibliography. Berglund's JavaSketchpad applets include circles in a lattice shape; affine polygons, which extends Napoleon's theorem from a triangle to a
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 Annotated Bibliography of Software Resources (The Chaos Hypertextbook)  Glenn Elert
An extensive annotated list of software related to Elert's Chaos Hypertextbook. Major categories include: Chaos (Dynamical Systems); Iterated Function Systems (IFS); Lindenmayer Systems; Mandelbrot & Julia Sets; Music; Newton's Method; Terrain &
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 Another Record Prime  Ivars Peterson (MathLand)
This time, it didn't take a supercomputer. The new record for the largest known prime number goes to someone using a Pentiumpowered desktop machine. Joel Armengaud, a computer programmer working for Apsylog in Paris, made the discovery on Nov. 13 and
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 anthropicprinciple.com  Nick Bostrom
A site on 'Anthropic reasoning', which involves concepts such as probability, objective chance, rationality, and observers. See problems like the Doomsday argument.
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 Antiprism  Adrian Rossiter
A set of programs for generating, manipulating, transforming, and viewing models of polyhedra. Open source, via the MIT license.
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 AP Analysis of PDEs (Front for the Mathematics ArXiv)  Univ. of California, Davis
Partial Differential Equation 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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 The Aperiodical  Steckles, Katie; Perfect, Christian; and Rowlett, Peter
"A meetingplace for people who already know they like maths and would like to know more." Posts, which date back to February, 2008, have included "Podcast: Episode 2  NoelAnn Bradshaw, Newton and Leibniz"; "9 is an experimental error"; "Wolfram Alpha
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 Apogee Tutors  Vimal Patel
Danbury, CT based tutoring services. We provide oneonone tutoring, group tutoring for middle school through college students.
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 Apophenia  Ben Klemens
An open statistical library for C. Similar to other statistics packages in function, Apophenia does not commit the user to an ad hoc language or environment, but rather keeps data in a database. Download the library, or contribute your own routines.
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 Appealing Numbers  Ivars Peterson (MathTrek)
A short history of amicable numbers  pairs in which each number is the sum of the proper divisors of the other. The smallest such pair is 220 and 284. The number 220 is evenly divisible by 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, and 110, which add up to
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 Applet Library (Project Links)  Rensselaer Polytechnic Institute
A library of applets in calculus; linear systems; differential equations; probability and statistics; and advanced math methods. Applets: Balance Applet; Beats; Bicycle Pedal; Bicycle Frame Angle, Frame Force, and Frame Length Analysis; Budget Optimization;
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 Application of Rayleigh's ShortCut Method to Polya's Recurrence Problem [PDF]  Peter Doyle
Doyle's Ph.D. thesis at Dartmouth College, June 1982. The goals of the presentation are to explain why Polya's theorem is true and to develop techniques for applying Rayleigh's method. The main results make sense of the notion that if two graphs look
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 Applications of Imaginary Numbers in the Real World  Bradley Chung
An exploration of typical questions about imaginary numbers, such as "Can you show me examples of imaginary numbers in the real world?" and "Are there any practical applications of imaginary numbers?" Lessons include "Mapping Imaginary to Physical"; "Complex
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 Applied Algebra Group  Dept. of Mathematics, Johannes Kepler Universität Linz, Austria.
This group has formed around Prof. Günter Pilz. One of its main research interests lies in nearrings: generalised rings that might generally be described as rings (N,+,*) where the addition is not necessarily abelian and only one
distributive law
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 Applied and Computational Category Theory  RISCLinz, Austria
A brief history and description of category theory, and some related links. From the Research Institute for Symbolic Computation.
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 Applied Chaos Lab (ACL)  Dr. W. Ditto; Georgia Tech University
The ACL covers a broad range of analysis and application of chaotic behavior and related phenomena. Much of the research is done in conjunction with researchers at other universities and extends into biophysics and other interdisciplinary areas. Researchers
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 Applied Management Science: Making Good Strategic Decisions  Prof. Hossein Arsham; University of Baltimore
Syllabus and notes for a course in Operations Research and Management Science. Sections include Course Information (for students enrolled in the class); Overcome Decidophobia by Management Science Approach; Deterministic Models; Probabilistic Models;
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 Applied Probability Journals  Applied Probability Trust (APT)
The Journal of Applied Probability and Advances in Applied Probability are published by Applied Probability Trust. Together they provide a forum for original research and reviews in applied probability, mapping the development of probability theory and
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 The Applied Probability Trust (APT)  University of Sheffield School of Mathematics and Statistics (SoMaS)
Nonprofit foundation for study and research in the mathematical sciences. It publishes research journals, a student magazine and occasional special volumes. The APT has been associated with the University of Sheffield School of Mathematics and Statistics
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 Applied Regression and Analysis of Variance  Charles Kooperberg; Univ. of Washington
A collegelevel statistics course. Regression analysis; problems in interpreting regression coefficients; estimation, including twostage least squares; guided regression: building linear models, selecting carriers; regression residuals; analysis of variance;
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 Applied Wavelet Analysis Courses  Gerald Kaiser
The Virginia Center for Signals and Waves, founded by mathematical physicist Gerald Kaiser, is dedicated to a physicsbased approach to signal analysis and processing. Information about Kaiser's book A Friendly Guide to Wavelets, his curriculum vitae,
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 Apprendre Maple  Alain Le Stang
Site en français dédié au logiciel de calcul formel Maple.
Vous y trouverez un cours complet, des exercices corrigés, et des thèmes d'approfondissement. Un moteur de recherche interne ainsi qu'un forum de discussion
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 Approaches to WWW Mathematics Documents  Ian Hutchinson
A brief summary, including some personal critiques, of different approaches to publishing mathematical documents on the World Wide Web. Treatment organized into five generic types: graphical page display (Adobe Acrobat and the .pdf file format), native
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