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refactor(Analysis/Calculus/FormalMultilinearSeries): generalize to additive monoids #9467

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@eric-wieser eric-wieser commented Jan 5, 2024

While many of the lemmas cease to apply,
the definitions of sequences and their sums are still perfectly well-behaved in additive monoids; no negation is needed.

In future, we could use this to generalize NormedSpace.exp such that it works with NNReal, but unless leanprover-community/mathlib#16554 or similar lands and provides a DivisionSemiring.nnqsmul field, that would conflict with #8370.

This also adds a new sub_apply lemma for good measure.


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…ditive monoids

While many of the lemmas cease to apply,
the definitions of sequences and their sums are still perfectly well-behaved in additive monoids;
no negation is needed.

We could use this to generalize `NormedSpace.exp` such that it works with `NNReal`,
but unless leanprover-community/mathlib#16554 or similar lands and provides a `DivisionSemiring.nnqsmul` field,
that would conflict with #8370.
@eric-wieser eric-wieser added awaiting-review The author would like community review of the PR awaiting-CI t-analysis Analysis (normed *, calculus) labels Jan 5, 2024
@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. label Feb 6, 2024
@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. label Mar 2, 2024
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!bench

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Here are the benchmark results for commit ee16fce.
There were significant changes against commit 1aabff1:

  Benchmark                                            Metric         Change
  ==========================================================================
- ~Mathlib.Analysis.Analytic.Basic                     instructions    12.0%
- ~Mathlib.Analysis.Analytic.CPolynomial               instructions    13.2%
- ~Mathlib.Analysis.Calculus.ContDiff.Basic            instructions     6.5%
- ~Mathlib.Analysis.Calculus.ContDiff.Defs             instructions    10.3%
+ ~Mathlib.Analysis.Calculus.FormalMultilinearSeries   instructions   -14.6%

@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. label Mar 4, 2024
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