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What our students say: "I know I am not the perfect student but I really am learning an awful lot and absolutely adore this module [Resampling Methods]. But it doesn't matter how I am doing, I still know I have already learnt a lot about something that I knew nothing about. Thank you for this opportunity and all the support received so far.” "The course was an interesting and delightful excursion into data mining techniques; I thoroughly enjoyed seeing the concepts come to life in the examples.
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One of the new papers on arXiv this week looks to me like an example of exactly what theoretical algorithms research should aim for: simple algorithms with nontrivial analysis, providing new and practical solutions to an important problem in which previous solutions were unsatisfactory. Unfortunately, the previous solutions were only unsatisfactory in practice, while from the theoretical point of view they were optimal; when this happens, it tends to make papers like this quite difficult to publish in algorithms conferences. The paper: "The Power of Simple Tabulation Hashing", by Mihai Pătraşcu and Mikkel Thorup, arXiv:1011.5200 . The problem: hashing algorithms are designed to work well with hash functions that are truly random (chosen uniformly from all possible functions that map the keys to be stored in the hash table into indices). But they are actually used with functions that are very nonrandom.
KNK103: The Crystals of Mt. Zeta - Kali & the Kaleidoscope
Summary : An expedition to conquer the greatest unsolved problem in mathematics - the Riemann Hypothesis . By amateurs across the world. A new online workshop by Kali & the Kaleidoscope. Starts Oct. 19, 2011.
Math Problems: Group Theory
3. Let G be a group of order 120, H a subgroup of order 24 such that there exists a left coset of H (different from H itself) which is equal to a right coset of H. Prove that H is normal in G.
Hello! I am an Assistant Professor in the MIT Department of Mathematics . I completed my Ph.D. in mathematics at Princeton University. My advisor was Benny Sudakov . Extremal combinatorics, algebraic and probabilistic methods in combinatorics, Ramsey theory, graph theory, combinatorial geometry, and applications of combinatorics to computer science.
Jacob Fox
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rsession - Java wrapper to R - Google Project Hosting
Rsession provides an easy to use java class giving access to remote or local R session. The back-end engine is Rserve 0.6, locally spawned automatically if necessary. Rsession differs from Rserve as it is a higher level API, and it includes server side startup of Rserve. Therefore, it is easier to use in some point of vue, as it provides a multi session R engine (including for Windows, thanks to an ugly turn-around). Another alternative is JRI, but it does not provide multi-sessions feature. If you just need one R session in your java code, JRI is a good solution.
ROCR: Classifier Visualization in R
Performance measures that ROCR knows: Accuracy, error rate, true positive rate, false positive rate, true negative rate, false negative rate, sensitivity, specificity, recall, positive predictive value, negative predictive value, precision, fallout, miss, phi correlation coefficient, Matthews correlation coefficient, mutual information, chi square statistic, odds ratio, lift value, precision/recall F measure, ROC convex hull, area under the ROC curve, precision/recall break-even point, calibration error, mean cross-entropy, root mean squared error, SAR measure, expected cost, explicit cost. ROCR features:
This is a mathematic computing environment like Matlab and Octave, but made to work on Android devices. The goal is for 100% compliance with how Octave works including a compatibility mode that makes the behavior more similar to Matlab (already very similar). Please file a bug for anything that is different from Matlab or Octave vs. Addi that matters to you. This will help me prioritize what features to go after next. You can find Addi App here (if you cannot find it from your device): https://market.android.com/search?
addi - Matlab / Octave clone for Android - Google Project Hosting
Math Vids offers free math help, free math videos, and free math help online for homework with topics ranging from algebra and geometry to calculus and college math. Get free math help from a teacher you understand. While other online video sharing sites rely on the community to flag videos as inappropriate only after they have done their damage, all videos and resources on MathVids are reviewed before you see them. Central to the vision of MathVids is that different students have different learning styles. MathVids supplements your classroom education with a variety of teachers explaining the same lesson in varied ways. Find What You Want, Quickly and Easily
Free Math Help and Free Math Videos Online at MathVids.com
J Home
J is a modern, high-level, general-purpose, high-performance programming language. J is portable and runs on Windows, Unix, Mac, and PocketPC handhelds, both as a GUI and in a console. True 64-bit J systems are available for XP64 or Linux64, on AMD64 or Intel EM64T platforms. J systems can be installed and distributed for free. J is particularly strong in the mathematical, statistical, and logical analysis of data. It is a powerful tool in building new and better solutions to old problems and even better at finding solutions where the problem is not already well understood.
po.org - MathExpo.EsHomePage
En => www.Experiencing Maths.org encontrará experimentos interactivos, inspirados en la exposición, y realizados por iniciativa de la UNESCO, destinados a docentes de enseñanza secundaria, en particular de los países del Sur . De sobra difundido este año en Chile, Angola y Córdoba. => DimensionsConstructing our lives: the mathematics of engineering | plus.maths.org
What do Gollum, the new Olympic stadium that's being built in London and the quest for sustainable energy have in common? They all involve the work of engineers. Engineering provides some of the most exciting applications of maths, which impact on all our lives every day. To highlight the importance and excitement of engineering, we are running a project called Constructing our lives . With kind support from The Royal Academy of Engineering the project brings you articles and podcasts on engineering, directly from the engineers themselves. On this page you can see all the material as we publish it, as well as some existing Plus content that's relevant to the subject.Seguimos insistiendo con los sitios que ofrecen cursos de nivel universitario de forma gratuita por Internet. Si ya vimos que Universidades de gran prestigio están abriendo secciones en sus páginas web para que cualquiera pueda ver y escuchar cursos de temas específicos, ahora es el momento de presentar algunos lugares donde podemos obtener más material de este tipo.