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For general introduction to mathematics, there is R. Courant "What is mathematics?" https://en.wikipedia.org/wiki/What_Is_Mathematics%3F https://en.wikipedia.or

by stared 12y ago

For general introduction to mathematics, there is R. Courant "What is mathematics?" https://en.wikipedia.org/wiki/What_Is_Mathematics%3F https://en.wikipedia.org/wiki/What_Is_Mathematics%3F.