This category is about mathematical logic and foundations of mathematics. (So it roughly corresponds to category 03-XX in the 1991 Mathematical Sciences Classification.) Major related subjects outside mathematics are computer science at one end, and philosophical logic at the other. If you are looking for basic, non-technical information on logic, you may want to look at the subcategories Encylopedia Articles and Educational Resources. If you think your site or one that you have come across fits here: please submit it. If not sure give it to us anyway ... we will do our best to find where it belongs.
Introduction to classical logic, including completeness and Löwenheim-Skolem theorems; by Stewart Shapiro.
Main online source on computability logic - a recently emerged formal theory of computational tasks and resources. Maintained by G.Japaridze.
Hyper-textbook for students by V. Detlovs and K. Podnieks.
Personal project to rebuild mathematics in a short and rigorous way from a new formalization of set theory, and explain its philosophical aspects. Also includes some physics.
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