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    Friedman's TREE(3) and related functions provably exceed ... — Carmelics
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    Supports→Harvey Friedman's work on independence results shows that arithmetically simple statements (e.g., finite Ramsey variants) can be independent of PA despite their Π₂ or Σ₁ form.

    Friedman's TREE(3) and related functions provably exceed PA's proof-theoretic strength, demonstrating genuine independence of simple combinatorial statements.

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    Harvey Friedman's work on independence results shows that arithmetically simple ...

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    Harvey Friedman's work on independence results shows that arithmetically simple ...

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