 DeadLine OnLine  Ionut Alex. Chitu
Freeware that graphs equations and precisely estimates their roots. It includes the option to evaluate the function and the first two derivatives, find extrema of the function and integrate numerically. For Visual Basicenabled computers running Windows
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 Decisioneering, Inc.
Excelbased decision analysis software tools (Crystal Ball, CB Predictor) for risk analysis and business forecasting.
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 Dekov Software
Educational software, a journal of computergenerated Euclidean geometry, and a computergenerated encyclopedia of Euclidean geometry. Current software titles include: Solving Triangles (stepbystep solutions to triangle problems in elementary geometry);
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 Demography: the Java Version  Daniel Udovic, Joshua Coxwell
Java Demography 2.0.2 simulates growth in age structured populations. The program's click and drag features allow users to directly manipulate the fertility and mortality graphs and the population's current age distribution, represented as a bar chart
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 Demos with Positive Impact  David R. Hill and Lila F. Roberts
A collection of classroom demonstrations that use some form of instructional technology. The authors invite others to submit demos and provide them with feedback on the demos already collected. Demos are organized under the levels of Pre Calculus, Calculus
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 Dept. of Statistics  University of Illinois at UrbanaChampaign
Web pages generated by statistics courses; biographical sketches of faculty, staff, lab members, and graduate students; department newsletter. Graduate program admission requirements, degrees offered, courses, statistical consulting services, and The
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 Descriptive Geometry  Petr Plavjaník
Software for creating and printing drawings, including conic sections, color fillings in Monge's projection, and axonometry. In English and Czech.
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 Diffpack  Numerical Objects Online
Diffpack is a collection of C++ modules containing a wide selection of interchangeable and applicationindependent components, useful as a set of linkable libraries integrated with existing applications or as a development framework including a fully
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 Directory of Computational Geometry Software  Nina Amenta; The Geometry Center
A list of computational geometry programs and packages, and other related algorithmic Web sites.
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 Discreta  Betten, Haberberger, Laue, Wassermann
A program to construct tdesigns with a prescribed automorphism group. Includes an explanation of the construction of tdesigns, a tutorial, a database of design parameter sets, publications, and source code to download.
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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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 Distance Calculus @ Suffolk University  Suffolk University and MathMonkeys, LLC
Calculus on the Web. Contents include: PreCalculus (functions, algebra, trigonometry); Calculus Topics (differential and integral calculus, sequences and series, multivariable calculus, differential equations); Assistance (student, instructor); Curriculum
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 D. J. Bernstein
Courses, research articles (in dvi format), and a list of available software, listed by a professor of mathematics and computer science at the University of Illinois. Pages are also listed by topic. Also at ftp://koobera.math.uic.edu/www/djb.html.
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 Dmitry Gokhman
Papers (Hardy fields; Differential fields of complex germs; Applied mathematics), Class lecture notes and summaries, code (IGF, LibPS 2, Python, Perl, TeXtool 2.12a), courses, translations, guests.
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 DOSE  G. B. Rubalsky
Determine Optimal Stocks Efficiently (DOSE) stands for the two software products DOSETRADE and DOSESERVICE, solving optimal inventory control problems for
trading enterprises and tech service enterprises. Both products work under Windows 95 and later,
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 DotNumerics  José Antonio De SantiagoCastillo
DotNumerics is a Numerical Library for .NET written in C#. It provides routines for: Linear Algebra (CSLapack, CSBlas, CSEispack), Differential Equations, and Optimization.
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 DPlot Plotting Software for Scientists and Engineers  David Hyde
A general purpose XY plotting program that features multiple scaling types, including linear, logarithmic, and probability scales, as well as several specialpurpose plots: tripartite grids (shock spectra), grain size distribution plots, and polar plots.
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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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 Drayton Analytics
A provider of optimisationrelated software to the Australian operations research community, and economic consulting services to the utility industries.
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 DreamCalc for Windows  Andy Thomas
A freeware scientific calculator for Windows, intended to replace standard handheld calculators. Fully featured range of math, scientific, statistical & financial functions. Supports natural fractions, complex numbers, basen logic, unit conversions
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 Dr. Genius  Hilaire Fernandes
Dr. Genius: "Geometry Exploration and Numeric Intuitive User System." The successor of the Dr. Geo Project, this GNU interactive geometry software allows the construction and manipulation of geometric figures. Read documentation, subscribe to the mailing
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 Dynagraph  Rouben Rostamian, University of Maryland, Baltimore County
Dynagraph is a 3D plotting utility for the X Window System. It draws 3D curves and surfaces representing mathematical expressions and numerical data, and allows for interactive rotation, zooming, and other manipulations of the displayed images. Read the
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 dynamicalsystems.org
An interactive laboratory on dynamical systems, in particular on particle systems. Software, Documents, and Links. Animated features include: Nonlinear chain; Forced Pendulum; Fermi system; Vlasov billiards; Vortex motion; 3 Body Problem; Convex Billiards;
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 Dynamische Geometrie Systeme (DGS)  Dr. Dörte Haftendorn
In German. Characteristics and comparisons of dynamic geometry systems; Euklid: characteristics, material, notes, software, lessons; TI92 calculator Cabri Geomètre materials. You may send for a 40page booklet on "Dynamic Geometry of Systems"
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 Easy Calci  Manoj Prabhakar
Calculators for linear algebra, statistics, length conversions and other measurements, interest and other financial topics, and more.
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 EasyFit: DistributionFitting Software  Mathwave Technologies
Automatically or manually fit probability distributions to data and select the best model in seconds. Key features include support for over 40 probability distributions, goodness of fit tests, and highquality interactive graphs. For Windows. Free trial
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 Easy Translator  Mapperz
Convert data from AutoCAD (DWG/DXF), CSV, GeoJSON, GML, GPX, DGN (v7), MapInfo (TAB), KML, or ESRI (Shapefile) into WGS84, WGS84 (GeoCentric), Mercator Projection, Robinson Projection, or Spherical Mercator.
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 Educational Math Software  Educational Software Directory
An annotated directory of math learning software.
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 Educational Resources  Avraham Goldstein
CGI for solving quadratic and cubic equations, performing polynomial division with remainder, finding real and complex roots of cubic equations, and analyzing polynomial functions (determining first and second derivatives, local maxima, minima, inflection
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 EDUSIG: Python in Education  Python Software Foundation
An informal venue for comparing notes and discussing future possibilities for the Python programming language in education. The special interest group's origins trace to Guido van Rossum's pioneering Computer Programming for Everybody (CP4E), a grant
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 efg's Computer Lab: Fractals & Chaos Page  Earl F. Glynn II
Links to programs for creating fractal images and examples of chaos, and to the Glynn Function Study Center Gallery, with various views of the Julia set, z > z^1.50.2, where z is a complex number.
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 Efofex Software
Produce publication quality graphics for mathematics and science. Tools for math teachers include FX Draw, for drawing; FX Equation, for equations; and FX MathSpell, a mathematics dictionary addin for Microsoft Word. Tools for math students include FX
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 eloancalculator
Free online calculators for borrowing and refinancing loans (student, personal, and auto), as well as amortization.
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 EMS: Easy Math Solution
Algorithm and componentbased commercial software. EquTranslator is a fast equation evaluator with parsetree builder and userfriendly interface for parsing and calculating a runtime defined math expression: F(x1, x2,..., xn)= f(x1, x2,..., xn). CxTranslator
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 Engauge Digitizer  Mark Mitchell
Software that takes a digital graph or map, and converts it into numbers. Engauge Digitizer automatically traces curves of line plots and matches points of point plots; handles cartesian, polar, linear and logarithmic graphs; supports draganddrop and
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 ENT: A Pseudorandom Number Sequence Test Program  John Walker
A program that performs various tests on a number sequence to analyze its degree of randomness. Download includes the MSDOS file ent.exe, C++ source code, and a Makefile to run ent in Unix. Links to a Java chisquare calculator.
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 Entropia.com
The Global Internet Community for Science and Mathematics Distributed Research Computing, Entropia.com is a community dedicated to performing real research on a massive scale using ordinary home and office computers connected through the Internet. Entropia.org's
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 Equation Solver  Alexey V.Voronin
Midlet "Equation Solver" is a mobile phone app intended to solve systems of linear algebraic equations with real coefficients of the second and third order (with two and three unknowns). System Requirements:
Mobile phone should have a color screen and
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 EquationSolver  Patrick McMordie
Online equation solver. In “real mode”, ES will solve a huge variety of equations in x (single real variable)  for example those involving polynomial functions of unlimited degree, logarithmic, trigonometric, ... . It’ll solve systems of linear simultaneous
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 Equation Wizard: Algebraic Equation Solver  Bogdan Kobets
The program allows you to solve algebraic equations in the automatic mode. You just enter an equation in any form without any preparatory operations. Step by step Equation Wizard reduces it to a canonical form performing all necessary operations. After
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 The ErdosStrauss Conjecture (ESC)  Allan Swett
The conjecture states that that for any integer n > 1 there are integers a, b, and c with 4/n = 1/a + 1/b + 1/c, a > 0, b > 0, c > 0. The page establishes that the conjecture is true for all integers n, 1 < n <= 10^14. With links to
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 Escher Web Sketch  Wes Hardaker, Gervais Chapuis; Univ. of Lausanne, Switzerland
A Java applet that allows you to draw repeating patterns. With documentation on how to use the applet, a pattern archive, the authors' favorite patterns, a link to download Escher Web Sketch, the program's source code, and interesting crystallographic
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 EuclideanSpace  Martin Baker
Introductions to algebra, geometry, calculus, discrete math, and statistics, particularly where relevant to 3D programming. In each subsection, Baker lays out notation and defines key terms to the right, in grey boxes with brown headers.
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 Euclide  Patrick Iglesias; Ecole Normale Supérieure de Lyon
Euclide est un logiciel d'apprentissage de géométrie plane pour
Macintosh destiné au collégiens et lycéens, pour aider à comprendre quelques théorèmes de géométrie plane, à
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 EucliDraw  Kostas Pamfilos, George Nikoloudakis, and Paris Pamfilos
A program to draw plane Euclidean geometry figures. Features include an extensible toolbox, animations, Euclidean and arbitrary transformations, a catalogue of trianglecentertools, SchemeSockets to combine and generate complicated schemes and fractals,
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 Euclid's Muse  Saltire Software
Hundreds of free interactive math apps created by users of Geometry Expressions, a constraintbased and symbolic geometry software package developed in part with grants from the National Science Foundation (NSF).
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 Euclid: The Game  Kasper Peulen
Classic Euclidean constructions using GeoGebra JavaScript.
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 Euklides  Peter Simon
Dynamic geometry shareware for twodimensional geometry; besides the basic elements, Euklides supports conics and point tracking (locus, cycloid). The multilayer capability ensures easy and efficient construction of drawings. The software produces precise
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 EUKLID  Roland Mechling
Dynamic geometry shareware in German and English. Create geometrical constructions on the screen just as on paper; then take a point in your drawing and drag it to another place, and the geometrical relations between all of the objects will be preserved.
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 ExperSim: Experimental Simulations  McClelland, Polson; University of Colorado
Generate simulated experimental data for four studies  Imprinting in Precocial Birds (Rajecki), The Etiology of Schizophrenia (Main), Motivational Factors in Routine Performance (Mueller), and Social Facilitation (Rajecki & HalsteadNussloch). For
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