[Merged by Bors] - feat(topology/homotopy/homotopy_group): group and comm_group instances for π_n
#15681
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Co-authored-by: Yury G. Kudryashov <urkud@urkud.name>
Co-authored-by: Junyan Xu <junyanxumath@gmail.com>
+ A function `f` from a `unique` type is equal to the constant function with value `f default`, and the analogous heq version for dependent functions. + Also changes `Π a : α, Sort v` in the file to `α → Sort v`. Inspired by #14724 (comment)
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forgot to label it awaiting-review ... now the main file has been ported to mathlib4 apparently |
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Thanks 🎉 bors merge |
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…ances for `π_n` (#15681) This PR adds: - Group instance for `π_(n+1)` - Commutative group instance for `π_(n+2)` Co-authored-by: Junyan Xu <junyanxu.math@gmail.com> Co-authored-by: Junyan Xu <junyanxumath@gmail.com> Co-authored-by: Kevin Buzzard <k.buzzard@imperial.ac.uk>
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group and comm_group instances for π_ngroup and comm_group instances for π_n
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…3874) just changing explicitness of one variable leanprover-community/mathlib#15681 Co-authored-by: Junyan Xu <junyanxu.math@gmail.com>
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…eanprover-community#3874) just changing explicitness of one variable leanprover-community/mathlib#15681 Co-authored-by: Junyan Xu <junyanxu.math@gmail.com>
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This PR adds:
π_(n+1)π_(n+2)port: leanprover-community/mathlib4#3874