Theorem Matrix.PosSemidef.posDef_iff_isUnit

Modification history

2026-09-15 23:40
Mathlib/Analysis/Matrix/Order.lean
chore(LinearAlgebra/Matrix/PosDef): generalize and golf `PosSemidef.posDef_iff_isUnit` (#43627)
Modified Matrix.PosSemidef.posDef_iff_isUnitView on Github →
2025-10-08 02:34
Mathlib/Analysis/Matrix/Order.lean
chore(LinearAlgebra/Matrix/PosDef): deprecate `PosSemidef.sqrt` in favour of `CFC` (#29896) …
Modified Matrix.PosSemidef.posDef_iff_isUnitView on Github →
2025-08-09 16:00
Mathlib/LinearAlgebra/Matrix/PosDef.lean
feat(LinearAlgebra/Matrix/PosDef): positive semidefinite matrix is positive definite iff is invertible (#28083)
Added Matrix.PosSemidef.posDef_iff_isUnitView on Github →