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In: Advanced Math

1. Let T : Mn×n(F) → Mn×n(F) be the transposition map, T(A) = At. Compute the...

1. Let T : Mn×n(F) → Mn×n(F) be the transposition map, T(A) = At. Compute the characteristic polynomial of T. You may wish to use the basis of Mn×n(F) consisting of the matrices eij + eji, eij −eji and eii.

2.  Let A = (a b c d) (2 by 2 matrix) and let T : M2×2(F) → M2×2(F) be defined asT (B) = AB. Represent T as a 4×4 matrix using the ordered basis {e11,e21,e12,e22}, and use this matrix to prove that the characteristic polynomial of T is the square of the characteristic polynomial of A.

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