 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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 Encyclopedia of Combinatorial Structures  Virginie Collette; INRIA
A site designed to be similar to Sloane's Encyclopedia of Integer Sequences but with an emphasis on sequences that arise in the context of decomposable combinatorial structures. Like the EIS, the database is searchable by the first terms in the sequence,
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 The Endeavour  John D. Cook
Cook's blog posts, which date back to January, 2008, have included "A Ramanujan series for calculating pi," "Limerick primes," "Twin prime conjecture and the Pentium division bug," "Three surprises with the trapezoid rule," "Where to wait for an elevator,"
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 Energy for Markov Chains [PDF]  Peter G. Doyle
A "very preliminary" paper touching on the Dirichlet principle, Escape probabilities and commuting time, The Monotonicity Law, and a Probabilistic interpretation of energy. PostScript and source file are available from Doyle's site.
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 Engineering Calculators  Gregory Monachos
Collection of online engineering calculators from Monachos Mechanical Engineering. Unit conversion, voltage drop, pipe friction loss, data
tables and more.
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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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 eOptimization.com
An informational meeting place for anyone interested in optimization software. Conduct an "application search" to find case studies, press articles, and vendors about the use of optimization in industries ranging from aerospace and apparel to sports and
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 EQUADIFF 10  Ivo Babuska, Jaroslav Kurzweil, Honorary Presidents
Czechoslovak International Conference on Differential Equations and Their Applications Prague, 2731 August 2001. See the Announcement for information about the venue, program, registration, accommodations, etc.
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 Equalis  Equalis LLC
Register for industrialgrade Scilab support and open source software in Scilab, Octave, Sage and R. Equalis also offers membersonly math blogs, discussion groups, and forums; opportunities to meet and collaborate; a career center for math and "mathcentric"
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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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 Equipped for the Future: Fundamentals  Equipped for the Future, National Institute for Literacy
Begun in 1994, the National Institute for Literacy’s Equipped for the Future (EFF) initiative started the development of a framework for adult learning content standards. These content standards were constructed to strengthen the ability of adult education
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 Equity & Access: General  Key Issues in Mathematics at The Math Forum
Issues, networks, general Web resources on equity in mathematics. Also entries of specific interest to minorities, women, people with disabilities, and nonEnglish speaking visitors.
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 EqWorld: The World of Mathematical Equations  Andrei D. Polyanin, editor
Extensive information on solutions to various classes of algebraic, ordinary differential, partial differential,
integral, and other mathematical equations. It also outlines methods for solving equations, includes interesting articles, gives links to
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 The Erdös Number Project  Jerry Grossman
Paul Erdos wrote hundreds of mathematical research papers in many different areas, many in collaboration with others. His Erdos number is 0. Erdos's coauthors have Erdos number 1. People other than Erdos who have written a joint paper with someone with
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 Erich's Combinatorial Geometry Page  Erich Friedman
Famous and infamous problems with diagrams and some solutions and proofs. Includes: tree planting problems; circles through points; maximizing squares; triangulating squares; triangulating triangles; lines avoiding squares; lines avoiding points; points
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 ESAIM: P&S  Probability and Statistics  EDP Sciences
An electronic journal created to publish original research and survey papers in the area of probability and statistics, covering theoretical and practical aspects in any field of these domains. Of particular interest are methodological developments with
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 Eskimo Pi  Keith Devlin (Devlin's Angle)
"As everyone knows, in the last century, the State of Indiana passed a law legislating the value of pi to be 3. Well, perhaps it's a bit of an exaggeration to say that everyone knows it, but most people do. But that alone is very odd, since it is not
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 Espaces Fibrés et Connexions  Robert Coquereaux
Un livre de géométrie différentielle en hypertexte; une introduction a la théorie des espaces fibrés et des connexions. A hypertext book in French on differential geometry.
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 An essay on patterns in musical composition, transformation, mathematical groups and the nature of musical substance  Bill Hammel
An article on music composition and history, with a discussion of the organizing principles of various musical scales as they affect musical composition and links to related sites.
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 Ethical Guidelines (AMS)  American Mathematical Society
Guidelines prepared by the Special Advisory Committee on Professional Ethics, (Murray Gerstenhaber, Frank Gilfeather, Elliott Lieb, and Linda Keen, chair), and adopted by the Council in the Spring of 1995 in the name of the Society. Topics address: Mathematical
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 Euclid Lab
This Californiabased nonprofit operates Camp Euclid, a mathematics research camp for high school students, as well as a sister program for junior and senior researchers (MRPU). See also Euclid Lab's "math blog written for all," Unsolved:, which discusses
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 Eugenia Cheng
Research as well as "things for nonspecialists" by a mathematician "keen to bring mathematics to a wider audience and help reduce maths phobia." Articles by the author of HigherDimensional Categories: An Illustrated Guide Book and Cakes, Custard and
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 Euler 2007
A celebration of Euler's 300th birthday in April 2007. Papers and abstracts from the various symposia and colleges are archived here, and further links to resources and web pages are offered.
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 The Euler Archive
The Euler Archive is an online resource for Leonhard Euler's original works and modern Euler scholarship. The searchable database provides access to his original publications, references to available translations, and current research. Also available
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 Eulerian Video Magnification for Revealing Subtle Changes in the World  Wu, HaoYu; et al.
Freely downloadable Matlab code that takes standard video sequence as input, applies spatial decomposition and temporal filtering, then amplifies the resulting signal to reveal temporal variations in videos otherwise difficult or impossible to detect
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 Euler Institute for Discrete Mathematics and its Applications (EIDMA)  Henk C. A. van Tilborg, Scientific Director
EIDMA's three main areas of research are: Discrete Algebra and Geometry; Coding Theory, Information Theory and Cryptology; and Combinatorial Optimization and Algorithms, Graph Theory. Its aim is to promote and organize research programs on a large scale,
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 The EULER Project  European Commission, Telematics for Libraries
Query a range of databases simultaneously through a single search interface. The European Libraries and Electronic Resources in Mathematical Sciences (EULER) service searches for mathematical resources such as books, preprints, Web pages, abstracts,
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 Euler's Identity and the Eucalculus  Charles Douglas Wehner
A new calculus  the Eucalculus  is introduced by showing its emergence from established art. However, as with complex mathematics, there may be restrictions on its use.
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 The Euler Society
The Euler Society was founded in 2002, and over the last six years has been highly successful in reinvigorating the teaching, learning, and wider understanding of Euler's role in mathematics and in the history of science. The Society continues to use
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 Euler Systems  Karl Rubin
One of the most exciting new subjects in Algebraic Number Theory and Arithmetic Algebraic Geometry is the theory of Euler systems. Euler systems are special collections of cohomology classes attached to padic Galois representations. Here, in the first
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 EuroMathJob  Sigmundur Gudmundsson; Lund University, Sweden
Vacant academic positions in the European Departments of Mathematics and Statistics: links to job pages around Europe, set up and maintained by the various member societies of the EMS, established by Sigmundur Gudmundsson (Lund University, Sweden) on
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 The European Consortium for Mathematics in Industry (ECMI)
A society to promote the use of mathematical models in industry and educate industrial mathematicians. Conferences, newsletter, certificate program in industrial mathematics, and prizes for related work.
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 European Journal of Pure and Applied Mathematics  Tekir, Ünsal; Çetin, Eyüp; and Delice, Ali, EditorsinChief
An international electronic journal for original research in the field of pure and applied mathematics and their teaching and learning. "The aim of the journal is to provide a medium by which a wide range of experience can be exchanged among researchers
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 The European Mathematical Information Service (EMIS)  European Mathematical Society (EMS)
Information about the EMS and its activities and projects (EULER and the Jahrbuch project); corporate and individual member listings; EMIS updates, conference calendar, job listings for the European mathematical community, other activities, and math links
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 European Society for Research in Mathematics Education (ERME)
Links to conferences of the European Society for Research in Mathematics Education (CERME).
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 European Women in Mathematics (EWM)
A society of women bound by a common interest in the position of women in mathematics. Membership information, meetings and conferences, and a newsletter.
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 Eurostat
The statistical office of the European Union, Eurostat collects statistics about European Union member countries, their neighbors, and their trading partners worldwide. Includes an introduction to Eurostat, selected socioeconomic figures including data
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 Exact Confidence Interval for a Proportion  Michael P. McLaughlin
Online calculator (with descriptive text) to compute a Bayesian credible interval for an observed proportion.
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 Example Problems.com  Todd Smith
This site is an opencommunity collection of math problems and full solutions for every area of math from Algebra through graduate level partial differential equations, optics, and special functions. The code used on the site's wiki is the same as TeX.
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 Excel's Solver and Premium Solver Platforms  Frontline Systems, Inc.
A resource for users of spreadsheets, optimization, and other mathematical software. Solver.com's free support information for the standard Excel Solver is more extensive than Microsoft's own site for Excel. Includes a Solver Tutorial and a set of powerful,
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 The Expected Number of Rising Sequences After a Shuffle [PDF]  Peter Doyle
A paper taking up Brad Mann's derivation of his simple expression for the expected number of rising sequences in a deck after a shuffle, which involved lengthy gymnastics with binomial coefficients. Doyle provides a short derivation. A PostScript file
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 Experiencing Geometry in Euclidean, Spherical, and Hyperbolic Spaces  David W. Henderson; Cornell University
A book that presents a series of problems. Most of the chapters start intuitively and are accessible to a general reader with no particular mathematics background; however, the discussions were written for mathematics majors and mathematics teachers and
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 Experimental Mathematics  A. K. Peters, Ltd.
A refereed journal devoted to experimental aspects of mathematical research. Browse full articles or abstracts, in PostScript of DVI, dating back to 1992's Volume 1. Also, read the journal's statement of philosophy and publishability criteria, subscription
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 Experimentàlis Hunlap (hun meg nem) a Titkos Tudományokról  Ferenc Molnár
New geometric discovery (site is in Hungarian).
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 Expert Choice
Analytic Hierarchy Process (AHP) and other decision support software for strategic planning and operations research.
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 Explaining Mathematics  Joel Feinstein
Ideas and praxis by a lecturer at the University of Nottingham (UK). Feinstein's blog posts, which date to December, 2008, have included "How and why we do proofs" and "Problems using LaTeX seminar class with pdflatex" and "Feedback on the use of IT in
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 Explicit Approaches to Modular Abelian Varieties  William Stein
Stein's Ph.D. thesis (Berkeley, 2000). An investigation of the Birch and SwinnertonDyer conjecture, which ties together the constellation of invariants attached to an abelian variety. The author attempts to verify this conjecture for certain specific
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 Exploring the Space of Cellular Automata  Langton, Hayden, Gutowitz, Carr, Fraser
Cellular automata (CA) are discrete space/time logical universes, obeying their own local physics according to given rules. Space in CA is partitioned into discrete volume elements called "cells" and time progresses in discrete steps. Each cell of space
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 Extended Finite Element Methods, Level Set Methods and Meshless Methods in Computational Mechanics  Stéphane Bordas
Describes my research in computational mechanics, geomechanics, fracture mechanics, meshless and extended finite element methods, plasticity, and aerospace castings.
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 The Extreme Science and Engineering Discovery Environment
Supercomputers, collections of data, new tools, and other integrated advanced digital resources and services for scientific research. See, in particular, the Education and Outreach Service of the Extreme Science and Engineering Discovery Environment (XSEDE),
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