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feat: precise close_preserve_not_fvar#580

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chenson2018 merged 1 commit into
leanprover:mainfrom
lengyijun:close_preserve_not_fvar
May 20, 2026
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feat: precise close_preserve_not_fvar#580
chenson2018 merged 1 commit into
leanprover:mainfrom
lengyijun:close_preserve_not_fvar

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(m⟦k ↜ y⟧).fv can be precisely represented: (m⟦k ↜ y⟧).fv = m.fv.erase y

`(m⟦k ↜ y⟧).fv` can be precisely represented:  `(m⟦k ↜ y⟧).fv = m.fv.erase y`
@lengyijun lengyijun requested a review from chenson2018 as a code owner May 20, 2026 08:53
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I am not in urgent need of this theorem; I merely happened to discover it.

@lengyijun lengyijun force-pushed the close_preserve_not_fvar branch from 9271581 to 5720811 Compare May 20, 2026 08:54
@lengyijun lengyijun changed the title feat: accurate close_preserve_not_fvar feat: precise close_preserve_not_fvar May 20, 2026
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Nice, thank you!

@chenson2018 chenson2018 added this pull request to the merge queue May 20, 2026
Merged via the queue into leanprover:main with commit caa9a9c May 20, 2026
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2 participants