Arithmetices principia, nova methodo exposita

Seminal mathematical work by Giuseppe Peano

The 1889 treatise Arithmetices principia, nova methodo exposita by Giuseppe Peano is widely considered to be a seminal document in mathematical logic and set theory, introducing what is now the standard axiomatization of the natural numbers, and known as the Peano axioms, as well as some pervasive notations, such as the symbols for the basic set operations ∈, ⊂, ∩, ∪, and A−B.

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