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feat(LocallyNameless): FullBetaEta - #862

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awesome-lambda-calculus:fullbetaeta
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leanprover:mainfrom
awesome-lambda-calculus:fullbetaeta

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@lengyijun lengyijun commented Sep 4, 2026 •

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  1. The old multi-step lemmas

redex_app_l_cong and redex_app_r_cong

become

single-step: step_app_l_cong / step_app_r_cong
multi-step: steps_app_l_cong / steps_app_r_cong

  1. new theorems:

step_fv
steps_fv
step_subst_cong_l
steps_subst_cong_l

@lengyijun
lengyijun force-pushed the fullbetaeta branch 5 times, most recently from 7692d00 to 75d1f4a Compare September 4, 2026 10:12
@lengyijun lengyijun changed the title feat(LocallyNameless): new theorems in FullBetaEta feat(LocallyNameless): FullBetaEta, Normal.sup_iff Sep 4, 2026
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I didn't notice that redex_app_l_cong was a poor name back in #571; I had simply copied it from FullBeta.lean.
Now I'm going to rectify that mistake.

@lengyijun
lengyijun force-pushed the fullbetaeta branch 2 times, most recently from 84486e7 to fb6c092 Compare September 21, 2026 23:46
@lengyijun
lengyijun force-pushed the fullbetaeta branch 2 times, most recently from 645a068 to aaf37b5 Compare September 21, 2026 23:52
@lengyijun lengyijun changed the title feat(LocallyNameless): FullBetaEta, Normal.sup_iff feat(LocallyNameless): FullBetaEta Sep 22, 2026
@lengyijun
lengyijun force-pushed the fullbetaeta branch 4 times, most recently from f3dfae0 to feaf49d Compare September 29, 2026 00:45
@lengyijun
lengyijun requested a review from crei as a code owner October 5, 2026 00:28
@lengyijun
lengyijun force-pushed the fullbetaeta branch 3 times, most recently from d265d26 to f3415c9 Compare October 14, 2026 04:56
    1. The old multi-step lemmas

    redex_app_l_cong and redex_app_r_cong

    become

    single-step: step_app_l_cong / step_app_r_cong
    multi-step: steps_app_l_cong / steps_app_r_cong

    2. new theorems:

      step_fv
      steps_fv
      step_subst_cong_l
      steps_subst_cong_l
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