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Classical Logic - http://plato.stanford.edu/entries/logic-classical/
Introduction to classical logic, including completeness and Löwenheim-Skolem theorems; by Stewart Shapiro. |
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Mathematical Logic and Foundations - http://www.math.niu.edu/~rusin/known-math/index/03-XX.html
From The Mathematical Atlas, a resource of mathematics maintained by David Rusin. Extensive resources related to logic and set theory. |
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Mind Versus Goedel by Damjan Bojadziev - http://nl.ijs.si/~damjan/g-m-c.html
Compares the mind to advanced computers and artificial intelligence, as Goedel would possibly view them. |
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Introduction to Mathematical Logic - http://www.ltn.lv/~podnieks/mlog/ml.htm
Hyper-textbook for students by V. Detlovs and K. Podnieks. |
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Computability Logic Homepage - http://www.cis.upenn.edu/~giorgi/cl.html
Main online source on computability logic - a recently emerged formal theory of computational tasks and resources. Maintained by G.Japaridze. |