Mathematica Asked on December 25, 2020
Let A
be a non-zero square matrix of order n, $ A^{*}$ be the adjugate matrix of A
, and $A^{T}$ be the transposition matrix of A
. now we need to prove that when $ A^{*}=A^{T} $, $|A| neq 0$ always holds.
adj[m_] :=
Map[Reverse, Minors[Transpose[m], Length[m] - 1], {0, 1}]*
Table[(-1)^(i + j), {i, Length[m]}, {j, Length[m]}]
Resolve[ForAll[{M ∈ Matrices[{3, 3}, Reals]},
M[Transpose] == adj[M], Det[M] != 0]]
The above code cannot verify this conclusion. What can I do to prove it?
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