Mathematics
59 sites
http://mathpuzzle.com/loyd
Ed Pegg Jr's digitized archive of Sam Loyd's 1914 'Cyclopedia of 5000 Puzzles, Tricks, and Conundrums' presents the classic puzzle book as a complete set of scanned page images freely available for download. This rare public-domain release preserves one of the most celebrated puzzle collections in mathematical history, making it an invaluable resource for recreational mathematics enthusiasts.
https://r-knott.surrey.ac.uk/Fibonacci/fib.html
Dr Ron Knott's comprehensive mathematics resource, hosted by Surrey University since 1996, covers Fibonacci numbers, the golden ratio, and their appearances in nature, art, geometry, architecture, and music. Packed with interactive calculators, puzzles, investigations, and dozens of linked pages exploring everything from Lucas sequences to phyllotaxis, this is one of the oldest and most thorough maths sites on the web.
https://onlinestatbook.com/rvls.html
The Rice Virtual Lab in Statistics (RVLS), created by David Lane at Rice University, offers a comprehensive suite of free web-based tools for learning and teaching statistics, including an interactive online textbook, Java simulations, real-world case studies, and an analysis lab. Supported by the National Science Foundation and recognized by multiple educational organizations, it covers topics from basic descriptive statistics to ANOVA and regression.
http://cat.boffosocko.com/
A collaborative study group blog documenting UCLA Extension's 2015 Category Theory course led by Professor Michael Miller, covering abstract algebra, functors, and related mathematical structures. Participants followed a structured syllabus across multiple chapters, sharing notes, resources, LaTeX diagrams, and meeting summaries over the summer term.
http://euclid.psych.yorku.ca/SCS/Gallery
Hosted at York University, the Gallery of Data Visualization is a reference collection showcasing classic and contemporary examples of statistical graphics and chart design. It serves as an educational resource for students and researchers interested in how data can be effectively communicated through visual means.
http://joyofpi.com/pilinks.html
A comprehensive link directory dedicated entirely to pi, curated by David Blatner, author of 'The Joy of Pi,' covering everything from basic pi facts and digit downloads to pi music, pi history, and Pi Day celebrations. Visitors will find hundreds of categorized links spanning memorizing pi, calculating digits, pi mysteries, and even wacky pi fun, making it a go-to hub for pi enthusiasts of all levels.
https://secure1.ed.brocku.ca/~rahul/Misc/pi.html
A page by a student or researcher at Brock University presenting the first 10,000 decimal digits of pi, calculated using Machin's formula on a Silicon Graphics MIPS R4400 workstation. It offers a concise glimpse into early 1990s academic computing power applied to a classic mathematical challenge.
http://nationalcurvebank.org/
The National Curve Bank is a mathematical archive dedicated to cataloging and exploring curves, offering detailed information on their properties, equations, and historical significance. A sister site to the Witch of Agnesi page, this project serves as an educational reference for students, educators, and math enthusiasts interested in the geometry of curves.
http://math.ucdavis.edu/~calculus
Calculus.org is a comprehensive educational hub hosted by UC Davis, offering step-by-step calculus problems, Java applets, Maple and Mathematica animations, and sample exams for both students and instructors. The site covers differential, integral, and multivariable calculus with resources ranging from humorous beginner guides to actuarial review problems, making it a well-rounded reference for anyone tackling the subject.
https://math.toronto.edu/mathnet/games/towers.html
Part of the University of Toronto Mathematics Network, this page explores the classic Tower of Hanoi puzzle through its legendary origins, an interactive playable version, and a deep dive into the mathematical patterns it reveals. Created by Philip Spencer, it connects the puzzle to concepts like Hamiltonian paths and higher-dimensional geometry, making it a genuinely enriching educational resource.