 Discussiones Mathematicae Graph Theory  Borowiecki; Technical University of Zielona Góra, Poland
The journal publishes articles in English on all aspects of graph theory, especially concerning: colourings, partitions (general colourings), hereditary properties, independence and dominating structures (sets, paths, cycles, etc.), cycles, local properties,
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 Discussions  Math Forum
The Math Forum's discussions include mathematics and math educationrelated newsgroups, mailing lists, and Webbased discussions. Read recent and older messages, find out how to subscribe to a mailing list that interests you, read an MAA Online article
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 Dissection (The Geometry Junkyard)  David Eppstein, Theory Group, ICS, UC Irvine
An extensive annotated list of links to material on problems of cutting a region (such as a polygon into the plane) into pieces (possibly putting them together to form a different polygon). Related topics include tiling (in which the whole plane is cut
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 Distributed Maple  Wolfgang Schreiner; RISCLinz, Johannes Kepler Universität Linz
A system for writing parallel programs in the computer algebra system Maple, so that different computers in a network can perform parts of the same computation. The program may be downloaded here in .tar or .zip form. The manual, a README file, and papers
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 The Distribution of the Knight  the Theoretical Research Institute
For every given starting point in the knight's tour problem, evaluate every
possible path that visits each square exactly once, and then count how many
solutions exist. Illustrations and calculations of the distribution of solutions
and dead ends across
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 Division by Three [PDF]  John Conway, Peter Doyle
A formal proof that it is possible to divide by three. This assertion is easy to prove using the axiom of choice, but becomes a much more difficult problem if the axiom of choice is not allowed (as is the case here). From this proof, and the much simpler
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 Divulgaciones Matemáticas  La Universidad del Zulia
Archives of the biannual Spanishlanguage research journal dating back to 1993. Most issues contain research papers (artículos de investigación), articles about teaching (artículos sobre enseñanza), expository and historical
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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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 Documenta Mathematica  Ulf Rehmann
Documenta Mathematica is open to all mathematical fields and is refereed in the traditional manner. Tables of contents for past issues are available in dvi.gz, dvi, and ps.gz formats, and you can view or download entire volumes.
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 Dominique Foata
Dominique Foata is a mathematician specializing in combinatorics. Abstracts of his papers are available online, and they may be downloaded in .dvi, PostScript, or TeX formats. The site also contains a summary and errata for the textbook Calcul des Probabilités,
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 Don Hatch's Home Page  Don Hatch
Hyperbolic tessellations shown in various stages of truncation, and represented by their Schlafli symbols. Java applets explore hyperbolic tessellations, a magic Rubik'slike cube in four dimensions, polygon reciprocation (dual), modern portfolio theory
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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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 Doron Zeilberger's Electronic Headquarters
Doron Zeilberger researches combinatorics using computer programs. The site is notable for his Opinions page; these opinions are wideranging but touch upon mathematics education, the use of computers, and the value of incomplete proofs. All of Zeilberger's
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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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 Downloadable Preprints  Dept. of Applied Mathematics and Statistics, Stony Brook
Abstracts of papers (1991) written by faculty and students in the department. Complete papers are available in PostScript, and can be downloaded from this site. They are also available via anonymous ftp. Recent Ph.D. Theses are also available.
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 DPGraph (Dynamic Photorealistic Graphing)  David Parker
Software that allows you to: display multiple simultaneous dynamic photorealistic 3D implicit equalities and inequalities, and intersections of their volumes; spin, slice, and view timedependent (moving) photorealistic surfaces in real time; and construct
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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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 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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 DS Dynamical Systems (Front for the Mathematics ArXiv)  Univ. of California, Davis
Dynamical Systems 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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 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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 Dynamical Systems data base  Giuseppe Zito
A database of around 50,000 planar dynamical systems of the type described by the formula: x = f(x,y), y = g(x,y), where f and g are algebraic functions containing constants and the four operations. The database has been used to test new visualization
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 Dyslexia Online
An online magazine offering information on and resources for dyslexia.
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 EAGER (European Algebraic Geometry Research Training Network)  Wolfram Decker
The members of EAGER are algebraic geometers in mathematical centres spreading among most European countries. These centres are grouped into twelve geographical nodes which are responsible for the management of joint research projects and for the training
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 Early Mathematics Education Project  Erikson Institute
"A solid early introduction to the 'big ideas' in mathematics can help a child succeed in school later on...." Read about Erikson Institute's teacher education workshops for foundational math, pedagogical research on the whole teacher approach by JieQi
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 EASI Street to Science, Engineering, and Math (SEM)
Equal access to software and information: an NSFsponsored project to collect and disseminate information on tools that make these fields more accessible to professionals with disabilities. Online workshops, Webcasts, links to programs for the visually
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 ECC Tutorial  Certicom
Elliptic Curve Cryptosystem Classroom introduces elliptic curves and how they are used to create a secure and powerful cryptosystem: elliptic curve groups over real numbers, over Fp, over F2m, and the discrete log problem. Certicom's 109bit and other
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 The ECMNET Project  Charron, Daminelli, Granlund, Leyland, Zimmermann
The goal of the ECMNET Project is to find large factors using the elliptic curve method, mainly Cunningham numbers.
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 Econometrics and Statistics eJournal  Istanbul University
Istanbul University Econometrics and Statistics eJournal is a refereed semiannual electronic journal which is published by Istanbul University Faculty of Economics, Department of Econometrics. The journal welcomes original Turkish and English scientific
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 Economic and Game Theory  David K. Levine, Department of Economics, UCLA
A site that uses the tools of modern economic theory and game theory to explore how the interaction of intelligent goalseeking individuals determines social outcomes. The site offers general interest material, undergraduate and graduate course material,
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 Edinburgh Mathematical Society (EMS)  Chris Smyth, EMS Secretary; Edinburgh University
Founded in 1883 for "the mutual improvement of its members in the Mathematical Sciences, pure and applied"; the principal mathematical society for the university community in Scotland. Its membership is drawn from all the Scottish universities and other
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 Edward Frenkel's Home Page  Edward Frenkel
Papers and other professional activities by the author of Love and Math, Langlands Correspondence for Loop Groups, and Vertex Algebras and Algebraic Curves. See, in particular, this Berkeley math professor's calculus lectures on YouTube. Frenkel, whose
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 The Effects of Moore's Law and Slacking on Large Computations  Gottbrath, Bailin, et al.; Steward Observatory, University of Arizona
A tongueincheek paper in which the authors show that, in the context of Moore's Law, overall productivity can be increased for large enough computations by 'slacking' or waiting for some period of time before purchasing a computer and beginning the
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 EG Models (Electronic Geometry Models)  Michael Joswig, Konrad Polthier
A refereed archive of interesting geometric examples and visualizations, open for any geometer to publish new geometric models, or to browse the models for material to be used in education and research. The geometry models cover a broad range of mathematical
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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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 EiffelMath: Object Technology For Numerical Computation  Interactive Software Engineering, Inc.
A library of reusable objectoriented components for numerical computation. Applying the full Design by Contract approach, simple routine interfaces (with small argument lists), simple and consistent error handling through Eiffel's disciplined exception
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 Einstein Archives Online  The Hebrew University of Jerusalem
Freely view thousands of Einstein's writings, digitized from the manuscripts held by the Albert Einstein Archives at the Hebrew University of Jerusalem: scientific correspondence, travel diaries, family letters, and more. The site also enables access
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 The Einstein Papers Project  California Institute of Technology
This database of 80,000 records of all known Einstein manuscripts and correspondence ranges from the physicist's first work on the special and general theories of relativity and the origins of quantum theory, to his active involvement with international
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 Electric Currents in Infinite Networks [PDF]  Peter G. Doyle
Networks as Riemann surfaces. A paper that shows how to get a more complete theory of conduction in infinite networks by paralleling the welldeveloped theory of conduction on open Riemann surfaces. PostScript and source file are available from Doyle's
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 Electronic Journal of Combinatorics  McKay, Wilf, Eds.
A refereed allelectronic journal that welcomes papers in all branches of discrete mathematics, including all kinds of combinatorics, graph theory, discrete algorithms, etc. See also The Electronic Journal of Combinatorics and The World Combinatorics
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 Electronic Journal of Differential Equations (EJDE)
An electronic publication (ejournal) dealing with all aspects of differential equations (ODEs, PDEs, integral equations, functional differential equations, etc.), and their applications. The EJDE accepts only firstrate original work, subject to as rigid
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 Electronic Journal of Linear Algebra (ELA)  International Linear Algebra Society (ILAS)
A refereed allelectronic journal for articles that contribute new information and insights to matrix analysis and the various aspects of linear algebra and its applications. It is primarily available to the public via the World Wide Web, in Haifa, Israel
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 Electronic Journal of Probability & Electronic Communications in Probability (EJPECP)  Institute of Mathematical Statistics
Two electronic journals, EJP and ECP. Abstracts, postscript, and PDF files of contents starting in 1996; author index; subscription and submission information.
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 Electronic Journal of Qualitative Differential Equations (EJQTDE)  Burton, Hatvani, editors
Papers appearing in EJQTDE are available in DVI, PS and PDF formats, and can be previewed or downloaded. All topics related to the qualitative theory (stability, periodicity, boundedness, etc.) of differential equations (ODE's, PDE's, integral equations,
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 Electronic Journals in Mathematics  Dept. of Mathematics, Univ. at Albany
Links to electronic journals for mathematics, and those publishing both electronically and on paper. Examples: The Electronic Journal of Combinatorics; The Electronic Journal of Differential Equations; Electronic Journal of Probability and Electronic
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 The Electronic Library for Mathematical Software (eLib)  KonradZuseZentrum für Informationstechnik Berlin (ZIB)
eLib contains CodeLib of ZIB; a mirror of NetLib of AT&T and ORNL; a mirror of the REDUCE network library RedLib of A. C. Hearn at Rand Corp.; the archives MPTestdata (programming problems), MathProg (programming codes), and the OptNet discussion
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 An Electronic Primer on Geometric Constraint Solving  Bouma, Chen, Fudos, Hoffmann, Vermeer
An primer with applications in fields such as molecular modeling, computeraided design, tolerance analysis, geometric theorem proving, and more. Four different "tours" through the material (overview, profile editor tutorial, theoretical foundations,
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 Electronic Proceedings of the Fifth MSIStony Brook Workshop on Computational Geometry  Dept. of Applied Mathematics and Statistics, Stony Brook
Electronic proceedings of the fifth in a series of annual fall workshops on Computational Geometry, sponsored by the Mathematical Sciences Institute (MSI), through the Army Center for the Mathematics of Nonlinear Systems at Stony Brook.
Abstracts of
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 Electronic Transactions on Numerical Analysis (ETNA)  Reichel, Varga, Eds.; Kent State University
An electronic journal for the publication of significant new and important developments in numerical analysis and scientific computing. Papers of the highest quality that deal with the analysis of algorithms for the solution of continuous models and numerical
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