Q55Section I (Objective (Q1–Q80))55 of 80

Linear Algebra — properties of the idempotent matrix from a g-inverse

Let $A^-$ be any generalized inverse of $A$ and $A^-A = H$ . Consider the following statements: I. $AH = A$ and $HA^- = A^-$ II. Trace $(H)$ = Rank $(H)$ Which of the statements given above is/are correct?

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