The proof is in the pudding. A look at the changing nature of mathematical proof PDF
1.1.2 Proof by Deduction, OCR A Level Maths: Pure Revision Notes 2018
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probability theory - A question on a proof of the existence of non-measurable sets - Mathematics Stack Exchange
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Formalizing the proof of PFR in Lean4 using Blueprint: a short tour
1.1.1 Language of Proof, AQA A Level Maths: Pure Revision Notes 2018