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feat: isSome_find? and isSome_findSome?#12432

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feat: isSome_find? and isSome_findSome?#12432
datokrat wants to merge 1 commit intomasterfrom
paul/humanevup4

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This PR adds the lemmas isSome_find? and isSome_findSome? to the API of lists, arrays and vectors.

@datokrat datokrat added the changelog-library Library label Feb 11, 2026
@github-actions github-actions bot added the toolchain-available A toolchain is available for this PR, at leanprover/lean4-pr-releases:pr-release-NNNN label Feb 11, 2026
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Reference manual CI status:

  • ❗ Reference manual CI can not be attempted yet, as the nightly-testing-2026-02-10 tag does not exist there yet. We will retry when you push more commits. If you rebase your branch onto nightly-with-manual, reference manual CI should run now. You can force reference manual CI using the force-manual-ci label. (2026-02-11 12:35:26)

mathlib-nightly-testing bot pushed a commit to leanprover-community/batteries that referenced this pull request Feb 11, 2026
@github-actions github-actions bot added the mathlib4-nightly-available A branch for this PR exists at leanprover-community/mathlib4-nightly-testing:lean-pr-testing-NNNN label Feb 11, 2026
mathlib-nightly-testing bot pushed a commit to leanprover-community/mathlib4-nightly-testing that referenced this pull request Feb 11, 2026
@mathlib-lean-pr-testing mathlib-lean-pr-testing bot added the builds-mathlib CI has verified that Mathlib builds against this PR label Feb 11, 2026
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@datokrat datokrat marked this pull request as ready for review February 11, 2026 14:00
@datokrat datokrat requested a review from kim-em as a code owner February 11, 2026 14:00
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