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LinearMap.isIdempotentElem_iff_eq_isCompl_projection_range_ker
Modification history
2025-07-28 23:36
Mathlib/LinearAlgebra/Projection.lean
feat(LinearAlgebra/Projection): define `Submodule.IsCompl.projection` (#27369) …
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LinearMap.isIdempotentElem_iff_eq_isCompl_projection_range_ker
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