Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2020-01-26 21:08 497e692b

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feat(linear_algebra/matrix): define the trace of a square matrix (#1883)

  • feat(linear_algebra/matrix): define the trace of a square matrix
  • Move ring carrier to correct universe
  • Add lemma trace_one, and define diag as linear map
  • Define diag and trace solely as linear functions
  • Diag and trace for module-valued matrices
  • Fix cyclic import
  • Rename matrix.mul_sum' --> matrix.smul_sum Co-Authored-By: Johan Commelin johan@commelin.net
  • Trigger CI

Estimated changes