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chore(data/fintype/card): instance well_founded_of_trans_of_irrefl #18774

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chore(data/fintype/card): instance well_founded_of_trans_of_irrefl #18774

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@vihdzp vihdzp commented Apr 9, 2023 •
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This PR does the following:

  • turn well_founded_of_trans_of_irrefl into an instance, rename to is_well_founded_of_strict_order
  • use is_strict_order α r instead of the equivalent is_trans α r + is_irrefl α r
  • remove preorder.well_founded_(lt/gt), as their instance forms can now be inferred automatically
  • golf + fix elsewhere

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@vihdzp vihdzp added awaiting-review The author would like community review of the PR awaiting-CI The author would like to see what CI has to say before doing more work. labels Apr 9, 2023
@vihdzp vihdzp added the modifies-synchronized-file This PR touches a files that has already been ported to mathlib4, and may need a synchronization PR. label Apr 9, 2023
@vihdzp vihdzp marked this pull request as draft April 9, 2023 15:44
@semorrison semorrison added the too-late This PR was ready too late for inclusion in mathlib3 label Jul 16, 2023
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awaiting-CI The author would like to see what CI has to say before doing more work. awaiting-review The author would like community review of the PR modifies-synchronized-file This PR touches a files that has already been ported to mathlib4, and may need a synchronization PR. too-late This PR was ready too late for inclusion in mathlib3
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