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15,461 open Lean 4 theorems · 1,048 proved · 26 contributors
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tactic: proof_irrelevance
tactic: theorem_v := nat
tactic: apply(nat.add_zero_right n)
=> ✓ (subgoal closed)
tactic: actual(case1)
tactic: show_sides < first_side>rest
tactic: undo(insert) > ref
tactic: reflexivity
tactic: ext_simple_17757108822294_ss
theorem = (test_side_e_17757)
=> ✓ solved 17757107226798Upvote theorems you care about — your votes shape which problems get recommended next.
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