📚 Recommended Mathematics Books

Topology (Munkres)  |  General Topology (Engelking)  |  Counterexamples in Topology  |  Rudin's Analysis

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In the article Generalization in ZF [HTML]

I formally define the notion of generalization in ZF set theory.

I also formalized the results of that article in the form of Isabelle proof assistant source files. You can download [HTML] the Isabelle files.