Theorem ContinuousLinearMap.IsIdempotentElem.ext_iff

Modification history

2025-07-13 04:28
Mathlib/Topology/Algebra/Module/LinearMap.lean
feat(Analysis/InnerProductSpace/Adjoint): idempotent operator `T` is self-adjoint iff `(range T)ᗮ = ker T` (#26855) …
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