 Multigrid Algorithm Library  Ulrich Ruede; German Scientific Computing Pages
Multigrid (MG) methods are fast linear iterative solvers based on the multilevel or multiscale paradigm. The typical application for multigrid is in the numerical solution of elliptic partial differential equations in two or more dimensions. MG can be
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 Multiple Regression with Applications  Elmer G. Wiens; Egwald Web Services Ltd.
Statistics programs with multiple regression and restricted least squares,
interactive and online model, used to predict Canadian Elections and to
estimate the ceofficients of a CobbDouglas Production Function.
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 Multirate Signal Processing Group  Univ. of Wisconsin  Madison
Members' research, software developed by the group, references; people, publications, other links.
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 Multithreaded Fractal Generator  Martin Hilpert
A fractal generator that is platform independent (running on any Java Virtual Machine) and uses many threads to calculate fractals for improved speed on multiprocessor/multicore computers.
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 MUltlog  Gernot Salzer et al.
MUltlog is a system that takes as input the specification of a finitelyvalued firstorder logic and produces a sequent calculus, a natural deduction system, and clause formation rules for this logic. All generated rules are optimized regarding their
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 MUltseq  Gil, Salzer
MUltseq is a generic sequent prover for propositional finitelyvalued logics. It is intended as companion for MUltlog, which computes optimized sequent rules from the truth tables of a finitely valued logic. MUltseq uses these rules to construct derivations
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 MultyGraphiX 2D & 3D function plotter  Sergey Petrov, ADC Software
Plot any mathematical 2D and 3D, explicit and parametric functions. Allows users to plot functions in Cartesian, polar, cylindrical, and spherical coordinates. Trial version available for this commercial software. Windows only.
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 Music and Virtual Flowers  Robert Walker
Fractal music, fractally based flowers, and geometrical models.
Programs are available for download. Make four and higherdimensional cubes and simplexes, then rotate them into the higher dimensions (so that the three dimensional projections change
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 MyBrain! A Cellular Automata Program  Ole Petersen
Download a small, powerful zipped CA program for any level of education/recreation.
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 Na_WorkSheet  Dana Proctor
The Na_WorkSheet is a collective aggregation of algorithms coded in
Java that implements various Numerical Analysis solutions/techniques.
The worksheet is generally aimed at educators and students that would
like to demonstrate or analyze various Numerical
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 Nauty  Brendan D. McKay; Australian National University
A program for computing automorphism groups of graphs and digraphs that can also produce a canonical labelling.
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 Neat Math and Programs  Robert Simms, Clemson University
A Map of All Triangles (and see the Introduction to a Euclidean Model of Hyperbolic Geometry; Porch Things (the underlying structure is a cube); generating Pythagorean Triples (includes a JavaScript calculator and a way to generate them from one number);
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 NEOS Guide (NetworkEnabled Optimization System)  The Optimization Technology Center
A thumbnail sketch, outlines of the major algorithms, and pointers to software packages on optimization and its various subdisciplines: integer programming, stochastic programming, network programming, bound constrained, nonlinearly constrained, linear
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 Nesting Software for Cutting Glass, Metal, Cutting Optimizer  Tom Tang
Nesting software for reducing scrap and generating optimum layouts for
cutting and nesting in sheet metal layout, fabrication, glass, building
panel, and woodworking industries. Samples and free demo downloads.
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 Nesting Software: PLUS (PaneL Utilization Software)
Software for reducing scrap and generating optimum layouts for cutting in sheet metal layout, fabrication, glass, building panel, and woodworking industries. Samples and free demo downloads.
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 Neural network music composition by prediction  Michael C. Mozer
Exploring the benefits of psychophysical constraints and multiscale processing. In algorithmic music composition, a simple technique involves selecting notes sequentially according to a transition table that specifies the probability of the next note
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 New York Group Theory Cooperative at CCNY
Genetic algorithms, open problems and preprints in combinatorial and geometric group theory, meetings, links, and MAGNUS, a free (GPL) graphically oriented system, based on Tcl/Tk, for computational group theory designed to allow for exploration and experimentation
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 NonEuclid  Joel Castellanos, Joe Dan Austin, Ervan Darnell
A Java program offering straightedge and compass constructions in hyperbolic geometry for high school and college students. A compressed version for PCs may be downloaded for use offline. The site includes an introduction to hyperbolic geometry, plus
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 Nonlinear Regression Analysis Program  Phillip H. Sherrod
NLREG is a statistical analysis program for Windows 95/98 and Windows NT which performs linear and nonlinear regression analysis and curve fitting. The software package determines the values of parameters for an equation, the form of which you specify,
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 NumberSpiral.com  Robert Sacks
Instructions, observations, formulas, and a glossary about number spirals, formed by writing the nonnegative integers on a ribbon, rolling it up with zero at the center, and arranging the spiral so all the perfect squares line up in a row on the right
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 NumberTheoretic Hacks  David Eppstein, Theory Group, ICS, UC Irvine
Simple numbertheoretic algorithms. Egyptian Fractions  algorithms and references; C++ implementation of J. H. Conway's "nimber" arithmetic; C++ fast algorithm for computing 2adic inverse; C program for rational approximation of real numbers; Interference
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 Number Theory Calculator  Bardesane: Giuseppe Merlino
A blog with free math programs for Windows: prime numbers, twin prime pairs, Goldbach conjecture, Collatz conjecture, Fibonacci numbers, N = x^2 + y^2, modpow (A^B mod. C), primality test, prime factors, divisors number and sum, Pascal's triangle, nextprime,
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 Number Theory  Dave Rusin; The Mathematical Atlas
A historical introduction to number theory; applications and related fields and subfields; textbooks, reference works, and tutorials; software and tables; other web sites with this focus; and selected topics.
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 numberworld.org  Alexander J. Yee
Yee takes mathematical constants such as pi, SQRT2, the golden ratio, e, log(2), log(10), and zeta(3) and calculates them to billions of digits. Read about and download ycruncher, his multithreaded piprogram. See also his timetable of notable large
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 Numeracy Works  David Hartmann, Numeracy Works LLC
Numeracy Works is a commercial software company which sells Tabula, a new tool for math education. Use Tabula to create, construct, cut, tape, fold, and transform. Make fold patterns, tiling patterns, tessellations, and perspective drawings. Also on
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 The Numerical Algorithms Group (NAG)  Oxford, UK
Products and services; libraries for the solution of mathematical problems: numerical software; statistical software covering all areas of statistical computation; compilers, tools, and code coverters for developers and programmers, symbolic software
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 Numerical Analysis  JeanPierre Moreau
Numerical analysis source code in BASIC, C++, FORTRAN, or Pascal. Program topics include real and complex roots, evaluation of Bessel functions, signal processing, matrices, and statistics.
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 Numerical Mathematics
Numerical mathematics software and general explanations of methods used.
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 Numerical Methods  Douglas N. Arnold; Mathematics Dept., Penn State University
An extensive list of centers (including online services and search engines), individual libraries, other sites (general and specific), journals, books, online publications, and other resources for numerical methods.
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 Numeritek  E. F. Toro
Home of Numerica, a library of source codes for solving hyperbolic partial differential equations using a broad range of modern, highresolution shockcapturing conservative and nonconservative numerical methods. Most of the programs are based on upwind
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 NuPrl Proof Development System  Cornell University, Ithaca, NY
A tacticbased proof assistant developed over the last 15 years at Cornell University. Its features include: very expressive logical language based on MartinLof type theory, extensive library of formal mathematics and automata theory, possibility of
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 Office for National Statistics  Government Statistical Service, United Kingdom
The United Kingdom agency that coordinates national statistics. Tables of key social, economic, and environmental data, press releases, catalogue of publications, articles, and a newsletter. Information about the British census, including articles in
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 One Mathematical Cat, Please! A First Course in Algebra  Carol J.V. Fisher Burns
This is a complete online Algebra I curriculum, along with lessons in geometry, algebra II, and calculus. Over 150 web exercises, all typeset in MathJax and some of which use GeoGebra, with printable randomlygenerated worksheets and solutions, offer
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 Online Calculator Software  PeoriaDesignWeb.com
Online Calculator Software is a collection of webbased online calculators to solve a variety of routine calculations. The tool is designed as an online spreadsheet and is meant to mimic the way a spreadsheet is set up. The only difference is the spreadsheet
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 Open Discrete Dynamic Programming Template (OpenDDPT)  Centi Riccardo
OpenDiscreteDynamicProgrammingTemplate : founds optimal constrainted parameters of a discrete controls with second order optimization template replacing Hessian with directional derivatives and backpropagation for digital filter (as neural network).
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 OpenFVM CFD solver
OpenFVM is a general CFD solver released under the GPL license. It was
developed to simulate the flow in complex 3D geometries. Therefore, the
mesh can be unstructured and contain control volumes with arbritrary shape.
The code uses the finite volume
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 OpenStat4 (OS4)  Bill Miller
A statistics package offering descriptive statistics such as central tendency and variability indexes, xy plots, and frequency distributions; Pearson productmoment correlations and partial correlations; analyses of variance including 1, 2 and 3way
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 OpsResearch  DRA Systems
A collection of Java classes for developing operations research programs and other mathematical applications. The site includes documentation and tutorials, and software download is free. Also features a bookstore and related links.
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 Optimalcut Web Software
Fee JavaScript optimization solver for cutting stock and bin packing problems. Specify pieces and rolls to linearly cut rectangles out of bars, pipes, tubes, metal profiles, extrusions, linear wood boards, and more (1D cutting); or sheets made of glass,
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 Optimalon Software  Denis Smirnov, Optimalon Software
Developing software for general linear programming tasks arising in educational, research and production areas. Includes an introduction to linear programming problems in the links section.
Products: GIPALS is a linear programming environment that combines
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 OptimalView  Sheela Belur
A Windows standalone program for minimizing a function by the simplex method
of Nelder and Mead. The trial software is twodimensional.
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 Optimization Technology Center  Argonne National Laboratory and Northwestern University
A research center dedicated to optimization problems. The "optimization tree," with descriptions of the different subfields of numerical optimization; interactive demonstrations and case studies, including the diet problem and minimum surface area; linear
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 Optimizer for Anyshape  SAMTEC
A professional profile nesting software package designed to maximize the use of material by generating most optimized nested layouts. It is a powerful true profile nesting software for gas/plasma/oxyfuel/laser cutting that will automatically optimize
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 Optimizer Suite  SAMTEC
A professional rectangular nesting software package designed to maximize the use of material by generating most optimized nested layouts. It is based on a highly advanced cutting algorithm, specially designed to optimize the cutting layouts in shearing,
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 The Organic Mathematics Project  Centre for Experimental and Constructive Mathematics (CECM)
A collaborative research project involving a number of researchers at the Centre for Experimental and Constructive Mathematics (CECM). Involves in part the development of WWWbased and Mapleassisted tools for document annotation and math activation.
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 OR/MS Today
Online version of the magazine for members of the Institute for Operations Research and the Management Sciences (INFORMS). Current and previous issues, with full text of many articles; subscription information; software surveys; classified ads and list
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 ostermiller.org  Stephen Ostermiller
Converters, Calculators, and JavaScript include Multiplication Game, in which letters represent digits in a multiplication problem; Length, which converts between units of length and distance; Roman Numerals, which converts between Arabic and Roman numerals;
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 Palisade
Software for Excel, including @RISK, using Monte Carlo simulation, and PrecisionTree, for risk analysis, decision analysis, optimization, and forecasting.
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 Panamath  Panamath.org
Have you ever tried to guess how many jelly beans are in a jar without counting? The Panamath test measures your number sense  your intuitive recognition of numbers and their relationships  and approximate number system (ANS) aptitude. Practice estimating
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 PaperFoldingFractals  Joel Castellanos, Rice University
A classroom teaching or personal learning software tool for Windows that can be an introductory lesson to fractals. Simple, stepbystep processes of paper folding can give rise to infinite verities of fractals. The user learns what fractals are and how
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