|Proof in logic, mathematics: finite string of symbols, which derives a statement in a system from the axioms of the system together with already proven statements.|
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|Proofs||A. d'Abro Die Kontroversen über das Wesen der Mathematik 1939 in Kursbuch 8 Mathematik 1967
E.g. If Euclid introduces factors in the proof of the infinity of the prime numbers, this is a device and does not follow from a logical > necessity.