International Society of Nonlinear Mathematical Physics
  

Other Useful Links:

  • Digital Library of Mathematical Functions, NIST (U.S. Department of Commerce), 2010-2024. Link [free access]
  • Encyclopedia of Nonlinear Science, edited by Alwyn Scott, Taylor & Franceis, 2004. Link
  • Concise Encyclopedia of Supersymmetry and Noncommutative Structures in Mathematics and Physics, edited by Steven Duplij, Warren Siegel and Jonathan Bagger, Springer, 2004. Link
  • Encyklopädie der mathematischen Wissenschaften mit Einschluss ihrer Anwendungen (Erschien 1898–1935, Neubearbeitung 1939–1967), Wikisource.  Link [free access]
  • EqWorld:The World of Mathematical Equations. Link [free access]
  • OEIS Wiki: The On-Line Encyclopedia of Integer Sequences® (OEIS®) Wiki. Link
  • The Stacks Project: An open source textbook and reference work on Algebraic Geometry, Columbia University, USA. Link
  • The Number Theory Web, Created and maintained by Keith Matthews, Brisbane, Australia. Link [visit also the List of Number Theory Books]
  • Association for Mathematical Research (AMR): Webpages for Research in Mathematics, Created and maintained by Anna Felikson (Durham University, UK). Link.
  • nLab: "A wiki for collaborative work on Mathematics, Physics, and Philosophy — especially (but far from exclusively) from the higher structures point of view: with a sympathy towards the tools and perspectives of  Homotopy Theory/Algebraic Topology, Homotopy Type Theory, Higher Category Theory and Higher Categorical Algebra". Link