[Merged by Bors] - chore: bump to nightly-2023-07-15 #5992
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This will need a fix to Std4. Edit: DONE. |
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Various adaptations to changes when `Fin` API was moved to Std. One notable change is that many lemmas are now stated in terms of `i ≠ 0` (for `i : Fin n`) rather then `i.1 ≠ 0`, and as a consequence many `Fin.vne_of_ne` applications have been added or removed, mostly removed. Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Wojciech Nawrocki <wjnawrocki@protonmail.com>
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Canceled. |
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Mathlib/Data/Fin/Basic.lean
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| /-- `succAbove p i` embeds `Fin n` into `Fin (n + 1)` with a hole around `p`. -/ | ||
| def succAbove (p : Fin (n + 1)) (i : Fin n) : Fin (n + 1) := | ||
| if i.1 < p.1 then castSucc i else succ i | ||
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| /-- `predAbove p i` embeds `i : Fin (n+1)` into `Fin n` by subtracting one if `p < i`. -/ | ||
| def predAbove (p : Fin n) (i : Fin (n + 1)) : Fin n := | ||
| if h : castSucc p < i then i.pred ((ne_iff_vne i 0).mpr (Nat.not_eq_zero_of_lt h)) | ||
| else i.castLT (Nat.lt_of_le_of_lt (Nat.ge_of_not_lt h) p.2) | ||
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| /-- `castPred` embeds `i : Fin (n + 2)` into `Fin (n + 1)` | ||
| by lowering just `last (n + 1)` to `last n`. -/ | ||
| def castPred (i : Fin (n + 2)) : Fin (n + 1) := predAbove (last n) i |
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Should we put these back to how they were in mathlib3 (ie, rename succAboveEmb back to succAbove)
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mathlib4/Mathlib/Data/Fin/Basic.lean
Lines 2032 to 2042 in f4e4287
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I think these were removed in this diff
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Ah, only succAbove was changed; I moved the other lemmas back to their original (unbundled) homes.
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Various adaptations to changes when `Fin` API was moved to Std. One notable change is that many lemmas are now stated in terms of `i ≠ 0` (for `i : Fin n`) rather then `i.1 ≠ 0`, and as a consequence many `Fin.vne_of_ne` applications have been added or removed, mostly removed. Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Wojciech Nawrocki <wjnawrocki@protonmail.com> Co-authored-by: Eric Wieser <wieser.eric@gmail.com>
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Various adaptations to changes when `Fin` API was moved to Std. One notable change is that many lemmas are now stated in terms of `i ≠ 0` (for `i : Fin n`) rather then `i.1 ≠ 0`, and as a consequence many `Fin.vne_of_ne` applications have been added or removed, mostly removed. Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Wojciech Nawrocki <wjnawrocki@protonmail.com> Co-authored-by: Eric Wieser <wieser.eric@gmail.com>
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Various adaptations to changes when `Fin` API was moved to Std. One notable change is that many lemmas are now stated in terms of `i ≠ 0` (for `i : Fin n`) rather then `i.1 ≠ 0`, and as a consequence many `Fin.vne_of_ne` applications have been added or removed, mostly removed. Co-authored-by: Scott Morrison <scott.morrison@gmail.com> Co-authored-by: Wojciech Nawrocki <wjnawrocki@protonmail.com> Co-authored-by: Eric Wieser <wieser.eric@gmail.com>
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Various adaptations to changes when
FinAPI was moved to Std. One notable change is that many lemmas are now stated in terms ofi ≠ 0(fori : Fin n) rather theni.1 ≠ 0, and as a consequence manyFin.vne_of_neapplications have been added or removed, mostly removed.