Mathematics, 04.04.2020 12:26 amesha62

A square matrix A is idempotent if A2=A. Let V be the vector space of all 2×2 matrices with real entries. Let H be the set of all 2×2 idempotent matrices with real entries. Is H a subspace of the vector space V?

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A square matrix A is idempotent if A2=A. Let V be the vector space of all 2×2 matrices with real ent...