given by (A) = trace(A). That is o la Let M2(Z) be the set of 2x2 matrices with integer coefficients, and let Ø: M2(Z) →
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given by (A) = trace(A). That is o la Let M2(Z) be the set of 2x2 matrices with integer coefficients, and let Ø: M2(Z) →
given by (A) = trace(A). That is o la Let M2(Z) be the set of 2x2 matrices with integer coefficients, and let Ø: M2(Z) → Z be [a b] = a + d. Prove or disprove that this is a ring dl homomorphism. = =
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