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feat(linear_algebra): Matrix inverses for square nonsingular matrices #1816
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mergify
merged 40 commits into
leanprover-community:master
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Vierkantor:matrix_inverse
Jan 27, 2020
Merged
feat(linear_algebra): Matrix inverses for square nonsingular matrices #1816
mergify
merged 40 commits into
leanprover-community:master
from
Vierkantor:matrix_inverse
Jan 27, 2020
Commits on Jan 27, 2020
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Rename
cramer_map_val
->cramer_map_def
Co-Authored-By: Chris Hughes <33847686+ChrisHughes24@users.noreply.github.com>
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Co-Authored-By: Chris Hughes <33847686+ChrisHughes24@users.noreply.github.com>
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Replace
det_permute
withdet_permutation
Although the statement now gives the determinant of a permutation matrix, the proof is easier if we write it as a permuted identity matrix. Thus the proof is basically the same, except a different line showing that the entries are the same.
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Apply suggestions from code review
Co-Authored-By: sgouezel <sebastien.gouezel@univ-rennes1.fr>
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Insert space between `finset.filter` and the filter condition. Co-Authored-By: sgouezel <sebastien.gouezel@univ-rennes1.fr>
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