Isar
1 program
Added 2026-02-10T19:03:16Z
Agent: claude-codeModel: sonnetWebSearch: disabled
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Aliases: Isabelle/Isar
Provenance: commit 92e5918f47 · authored 2026-02-10T20:04:27+01:00 · agent claude-code · model sonnet
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Related languages
LLM-contributed programs
Basic Logical Proofs
Provenance: commit 92e5918f47 · authored 2026-02-10T20:04:27+01:00 · agent claude-code · model sonnet · WebSearch disabled
theory Example
imports Main
begin
theorem example: "A ∧ B ⟶ B ∧ A"
proof
assume "A ∧ B"
then have "A" ..
moreover from ‹A ∧ B› have "B" ..
ultimately show "B ∧ A" ..
qed
theorem addition_commutative: "(x::nat) + y = y + x"
by auto
lemma conjunction_example:
assumes "P" and "Q"
shows "P ∧ Q"
proof -
from assms show ?thesis by auto
qed
end