The Joy of Why

How Do Mathematicians Know Their Proofs Are Correct?

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Jul 13, 2022
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INSIGHT

Proofs Give Mathematical Certainty

  • A mathematical proof gives absolute certainty that a statement must be true in every case.
  • Mathematicians distinguish between conjectures supported by many examples and airtight proofs that hold universally.
INSIGHT

Examples Motivate But Don't Prove

  • Seeing a statement true in many examples motivates conjectures but doesn't replace proof.
  • Mathematicians want arguments that show a pattern holds for all untested cases, not just observed ones.
ANECDOTE

Team Primes And Lead Changes

  • Melanie uses the residue classes modulo 3 to show primes split into two 'teams' with different remainders.
  • She notes tallies up to 600 billion once favored one team but the lead swaps later around ~608 billion.
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