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- Replace `altP eqP` and `altP (_ =P _)` with `eqVneq`:
The improved `eqVneq` lemma (#351) is redesigned as a comparison predicate and
introduces a hypothesis in the form of `x != y` in the second case. Thus,
`case: (altP eqP)`, `case: (altP (x =P _))` and `case: (altP (x =P y))` idioms
can be replaced with `case: eqVneq`, `case: (eqVneq x)` and
`case: (eqVneq x y)` respectively. This replacement slightly simplifies and
reduces proof scripts.
- use `have [] :=` rather than `case` if it is better.
- `by apply:` -> `exact:`.
- `apply/lem1; apply/lem2` or `apply: lem1; apply: lem2` -> `apply/lem1/lem2`.
- `move/lem1; move/lem2` -> `move/lem1/lem2`.
- Remove `GRing.` prefix if applicable.
- `negbTE` -> `negPf`, `eq_refl` -> `eqxx` and `sym_equal` -> `esym`.
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This increases performance 10% - 15% for Coq v8.6.1 - v8.9.dev.
Tested on a Debain-based 16-core build server and
a Macbook Pro laptop with 2,3 GHz Intel Core i5.
| | Compilation time, old | Compilation | Speedup |
| | (mathcomp commit 967088a6f87) | time, new | |
| Coq 8.6.1 | 10min 33s | 9min 10s | 15% |
| Coq 8.7.2 | 10min 12s | 8min 50s | 15% |
| Coq 8.8.2 | 9min 39s | 8min 32s | 13% |
| Coq 8.9.dev(05d827c800544) | 9min 12s | 8min 16s | 11% |
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It seems Coq at some point fixed the problem `_ : Type` was
supposed to solve.
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- countalg goes to the algebra package
- finalg now get the expected inheritance from countalg
- closed_field now contains the construction of algebraic closure for countable fields (previously in countalg)
- proof of quantifier elimination for closed field rewritten in a monadic style
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These were all GRing.Zmodule.sort, instead of the corresponding sort
in GRing (Ring.sort, Comin.sort, etc).
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