 3DMathematikprogramm  Ingenieurbüro Riescher
German shareware program for Windows: MATHPROF ist ein einfach bedienbares Mathematikprogramm mit graphischen 2D und 3DDarstellungen, für Schüler, Studenten und Lehrer. Auch lassen sich einfache Konstruktionen im 2D und 3DBereich erstellen und analysieren.
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 AIMMS  Paragon Decision Technology
This optimization software for advanced modeling concepts features solvers for major mathematical programming types and a full graphical user interface both for developers and endusers. Read about features and licensing options; see industrial applications,
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 Akustische Täuschungen/Acoustic illusions  Stefan Scheller
Endlos ansteigende Melodien: Der ShepardEffekt. Endlessly rising melodies: The Shepard effect. (Illustration: M. C. Escher: Treppauf, treppab  ascending, descending.) Besides the wellknown optical illusions there are acoustic ones, too. Perhaps the
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 Alice begegnet der 4. Dimension  Stefan Scheller
(Alice encounters the 4th dimension) Einige faszinierende 3DAnimationen hat diese Homepage zu bieten. "Alice begegnet der vierten Dimension" ist hauptsächlich eine umgeschriebene Kurzversion der bekannten skurilen Kindergeschichte aus England. Der
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 Alta Vista
A major Web search engine, also offering major categories to browse (Automotive; Business & Finance; Computers & Internet; Health & Fitness; Hobbies & Interests; Home & Family; Media & Amusements; People & Chat; Reference &
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 Applied Statistics
Place for finding partners in the field of applied statistics, spatial statistics, computational statistics, bayesian statistics. Open Source Software and Presentations. Site available in German, English, and Russian.
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 Arbeitsgruppe Bachem/Schrader  University of Köln
A working group of the Center for Parallel Computing (ZPR) at Köln. Site includes a list of members and contact address; informative writeups on its projects, some in English. Topics include: Basic Research (meaning "pure" as opposed to "applied");
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 Arbeitsgruppe Mathematische Logik und Theoretische Informatik  Ru[rechtKarls_Universität Heidelberg, Germany
Aktuelles, Anshriften, und Personen.
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 The Art of Calculating Real 2D Vectors  Hero van Jindelt
Freeware: Print the text for pupils. Numerical 2Dcalculator. We don't need
words like imaginary, complex number, or Argand Diagram any moresave them
for a history lesson. Ordinary vectorcalculation with a "new" (centuriesold) multiplication,
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 Austrian Center for Didactics of Computer Algebra (ACDCA)
Download teaching examples, materials, and exams that use Computer Algebra Systems (CAS)  in particular, the TI92 calculator. With bugs, tips and cheats in handling the TI89, TI92, and Texas Instruments Voyage200. Also, get news about the Center
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 Auto Rueda: Multiplication Tables  Jose Manuel del Toro Pérez; del Toro Ediciones
An effective method that fosters selflearning of the multiplication tables.
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 Bernhard Kutzler's Collection: Technology in Mathematics Education  Bernhard Kutzler
Read or download the author's articles: "Algebraic Calculators as Pedagogical Tools for Teaching Mathematics"; "Indispensable Manual Calculation Skills in a CAS Environment"; "TwoTier Exams as a Way to Let Technology in"; and "Interconnectivity  Derive
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 Brainly.com.br
"Estudamos em grupo." Faz perguntas; responde para ganhar rankings. Veja, em particular, o arquivo de dever e soluções na area de matemática.
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 Calc3D  Andreas Greuer
Calc 3D is a free program for calculating 3dimensional vectors, matrices and
complex numbers with Windows 95/98/NT. Cartesian coordinates, spherical coordinates und cylindrical coordinates can be transformed into each other.
Distances, intersections,
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 Central Service for Statistics and Economic Studies (STATEC)  Luxembourg
The agency for official statistics for the country of Luxembourg. Description of the agency and tables, graphs, and brief articles about key social and economic data available in English and German. More information may be found in the French version
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 The Chaosgruppe  Sperl, Rast
A nonprofit scientific Association for direct support of current research projects and dialogue between faculties and interested amateurs about phenomena of nonlinear dynamics and pattern formation. The association produces a Who's Who Handbook of nonlinear
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 Chaos  Étienne Ghys et al.
A free, two hourlong film about dynamical systems, the butterfly effect, and chaos theory. Available in many languages, and as a DVD.
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 CLKCalculator  Lars Kobarg
Reverse Polish notation Calcualtor is a calculator program for Windows with unit conversion and matrix calculator, functions for vectors and complex numbers, and a
function plotter.
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 Computerorientierter Mathematikunterricht zur Diskussion  Christian Wagenknecht
Computeroriented Math Teaching. Lernen und Lehren mit dem Computer. Theory and practice with the computer. A paper in German by Wagenknecht on computers and math teaching; integrating the computer into the classroom; impediments (fear of computers, reluctance
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 Critical Evaluation Information  Kathy Schrock's Guide for Educators, Discovery School
With the advent of the World Wide Web and the huge amount of information it contains, students need to be able to evaluate a Web page for authenticity, applicability, authorship, bias, and usability. To help teachers get students started with this process,
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 Czech Statistical Office (Cesky statisticky úrad)  Czech Republic
Collects and distributes statistical data for the Czech Republic. Includes various statistics and maps on regional variation, release dates and ordering information for various publications, introduction to the department, and a FAQ about the value of
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 Design, Analysis, Implementation, and Evaluation of Graph Drawing Algorithms  Petra Mutzel
Automatic Graph Drawing is a relatively new field in Computer Science. The task is to draw diagrams of objects and their relations in such a way that they are easy to read and understand. Applications are, e.g., animation of algorithms, data and flow
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 Developing Quality in Mathematics Education  Christof Höger
Download Microsoft documents of short word problems and their solutions, each categorized by age and tested for use in the classroom. Developing Quality in Mathematics Education (DQME) received support from the European Commission. Also available in Danish,
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 Digital Deletions  Pierre Ysewijn
An interactive JavaScript version of Conway's Digital Deletions game, in which numbers in a string are lowered to zero or erased. Users can play with different numbers of digits, different strategy levels, different starters, different sources of digits
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 Dimensions  Étienne Ghys et al.
"Mathematical vertigo guaranteed": this free, two hourlong film gradually takes viewers up to the fourth dimension. Available in many languages, and as a DVD.
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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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 edin.us  Edin
Makers of the arithmetic apps Digitron, which challenges players to form true equations out of numbers and operators as they tumble down the screen, in the style of Tetris; and Math Samurai, which challenges players to identify the missing operation in
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 Elliptic Curves II  Johan P. Hansen; Dept. of Mathematics, Ny Munkegade, Aarhus
Lecture notes in English and German, a continuation of the course: "Elliptic curves over Q and C," on modular forms and elliptic curves.
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 EMTeachline
Commercial software and online demos with thousands of fully explained, stepbystep solutions of equations, inequalities, and more. With interactive teaching algorithms for training problemdrilling skills, testmaking software, and a guide to mathrelated
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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 Euro  European Central Bank
On January 1, 2002, euro banknotes and coins were put into circulation. This site has sections for: euro banknotes and coins, getting ready for the euro, information for organizations, a children's zone, background to the euro, and news and events.
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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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 The Evariste Galois Archive  Bernard Bychan
A biography of Galois in five different languages, a mailing list, and an introduction to Galois Theory.
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 Experiments with the 3n+1 Sequence  Alfred Wasserman
An online program tests numbers for convergence under the 3n + 1 sequence. Also available in German.
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 Exploratorium's Science of Cycling  The Exploratorium
Organized into seven sections. Introduction: What is the Science of Cycling? The wheel: Why do road bikes have thin tires, while mountain bikes have fat tires? Drives and gears: What is a gear ratio? And how do gears help make the bicycle so efficient?
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 fbWebTutor: Online Nachhilfe in Mathematik  fbWebTutor
Download video tutorials on mathematics, information and book reviewsall in German.
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 Federal Statistical Office Germany
The statistics department of the German government. Press releases; socioeconomic data, with brief articles and key statistics; tables of recent economic figures; population data for other countries; the purchasing power of the deutschemark. Methodological
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 Fibonacci Numbers and the Pascal Triangle  Radoslav Jovanovic
Brief articles about Pascal's triangle, Fibonacci numbers, Lucas numbers, and the golden section, including the relations between Fibonacci numbers and Pascal's triangle, and Fibonacci numbers and the golden section. In English, German, or Serbian.
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 Finanzierungsrechner
Online calculation tools to perform financial calculations such as IRR, NPV, and annual interest rates.
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 Fixedpoint arithmetic: multiplication  Paul Molitor; Universitat Hälle
A collection of Java applets, each showing a different method of fixedpoint multiplication: Binary representation, the Schoolmethod, Booth's algorithm, and Parallel multiplication, written for a course in Computer Science ('Computer Arithmetic'). After
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 Fourier Synthesis  Manfred Thole
A periodic signal can be described by a Fourier decomposition as a Fourier series, i.e. as a sum of sinusoidal and cosinusoidal oscillations. By reversing this procedure a periodic signal can be generated by superimposing sinusoidal and cosinusoidal waves.
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 The Game of Chaos  Juergen Giesen
This applet performs the following game at varying speeds: Choose a random starting point (o) within the triangle ABC. Roll a die. Connect the point with point A, when you roll 1 or 2; with point B, when you roll 3 or 4; with point C, when you roll 5
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 Games for the Brain  Philipp Lenssen
Race the "IQ Score" clock while playing JavaScript brain teasers such as NumberCruncher (perform arithmetic calculations following order of operations) and Marsmoney (calculate the values of different currencies). The site also features several memory,
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 Georg Friedrich Bernhard Riemann (History of Mathematics Archive)  David R. Wilkins
A biography and selected papers of Bernhard Riemann, available online or for download in various formats. A lecture on geometry and the paper which contains the Riemann Hypothesis are available in English translation; the other papers remain in the original
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 German Language Math Resources  Math Forum
Mathematics and math education resources available online in German, collected by the Math Forum. Sites are organized by: Research Centers, Articles and Publications, Software, and Other Educational Resources.
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 Gesellschaft für Didaktik der Mathematik (GDM)
An organization that studies methods of teaching mathematics. More information is available in German.
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 Hilbert's Tenth Problem  Russian Academy of Sciences
A page to promote research connected with the negative solution of Hilbert's Tenth Problem and developed techniques, which have applications in the theory of algorithms, algebra, number theory, model theory, proof theory and in theoretical computer science.
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 Historical Mathematics Monographs  Cornell University Library
More than 550 books in English, French, German, and Italian, scanned from originals held by the Cornell University Library. The Collection is indexed, can be browsed by author and title, and is freely available online to the public.
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 Hungry Frog Software  Science Education Software Inc. (SESI)
Educational software for Windows 95/NT and Apple Macintosh  Math, Chemistry 512, Latin/Greek HS & College, and languages, 412 (French, Spanish, Italian, German). All of the Hungry Frog games are based on the same fundamental game scenario: frogs
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 Hyperbolic Tilings  Sascha Rogmann
A link to Rogmann's thesis (in German) and to pages on shells around the dodecahedron; 1+110+3458 cubes; hyperbolic buckyballs; hyperbolic animations; triangletessellations; quadrangletessellations; twoholed cloth torus; Subsets of PSL_2(Z[w]), D=3,
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