The Applied Probability Trust (Popularity: ): The Applied Probability Trust is a non-profit foundation for study and research in the mathematical sciences. It publishes research journals, a student magazine and occasional special volumes. Probability Theory and Stochastic Processes (Popularity: ): Part of Dave Rusin's excellent Mathematical Atlas. Measure and Integration (Popularity: ): Part of Dave Rusin's excellent Mathematical Atlas An Introduction to Stochastics and Finance (Popularity: ): Links to web sites related to financial mathematics : Introduction to stochastic analysis applied to finance, option pricing and risk management. The Collector's Problem and the Two-Dimensional Factorial (Popularity: ): In finding a new solution to a classic probability problem concerning the collection of items in a set, a new and useful recursive function has been found, the "two-dimensional factorial." ArXiv Front: PR Probability Theory (Popularity: ): Probability section of the mathematics e-print arXiv Math Surprises: An Example (Popularity: ): Buffon's Needle simulation and a surprising demonstration of Barbier's theorem about shapes of constant width The Probability Web (Popularity: ): A collection of pages maintained by Bob Dobrow to serve people with interests in probability theory and its applications. Parrondo Paradox (Popularity: ): Parrondo Paradox simulation and a demonstration of the ratchet effect. Probabilistic Learning Activities Network (Popularity: ): Probability activities and simulations in the form of applets and spreadsheets. This site advocates a Question/Hypothesis/Experiment approach to learning probability. Applied Probability Society (Popularity: ): A subdivision of the Institute for Operations Research and the Management Sciences (INFORMS) concerned with the application of probability theory to systems that involve random phenomena.