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feat(LocallyNameless/Untyped): FullEta.steps_open_cong_l - #705

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awesome-lambda-calculus:fulleta.steps_open_cong_l
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awesome-lambda-calculus:fulleta.steps_open_cong_l

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lengyijun force-pushed the fulleta.steps_open_cong_l branch 2 times, most recently from c05b3f9 to e7935cd Compare July 10, 2026 01:03
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Mirror of FullBeta.step_open_cong_l

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lengyijun force-pushed the fulleta.steps_open_cong_l branch from e7935cd to b87185d Compare July 21, 2026 00:31
@chenson2018 chenson2018 self-assigned this Jul 25, 2026
case refl => rfl
case head _ _ st _ ih => exact .trans (step_open_cong_r lc_s lc_t st) (ih (step_lc_r st))

theorem steps_open_cong_l {s s' t : Term Var} (xs : Finset Var)

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Similar to what I suggested in #738, I think it is useful to also have the single-step version of this even if it is technically less general.

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lengyijun force-pushed the fulleta.steps_open_cong_l branch from b87185d to 82bb32d Compare September 16, 2026 05:07
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lengyijun force-pushed the fulleta.steps_open_cong_l branch 2 times, most recently from 4e472d6 to 125495d Compare September 21, 2026 23:46
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lengyijun force-pushed the fulleta.steps_open_cong_l branch 3 times, most recently from 36df0cd to 2919244 Compare September 28, 2026 00:14
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lengyijun force-pushed the fulleta.steps_open_cong_l branch 2 times, most recently from f0651b8 to c457f7f Compare October 5, 2026 00:29
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lengyijun requested a review from crei as a code owner October 5, 2026 00:29
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lengyijun force-pushed the fulleta.steps_open_cong_l branch 3 times, most recently from a26fb1a to 53102b5 Compare October 14, 2026 04:56
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lengyijun force-pushed the fulleta.steps_open_cong_l branch from 53102b5 to d89b7ae Compare October 17, 2026 00:20
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