Bozarth
Sunday, 25 August 2013
matrix $X$ such that for any matrix $Y$, $det(X^2 + Y^2) \geq 0$?
matrix $X$ such that for any matrix $Y$, $det(X^2 + Y^2) \geq 0$?
What is the characterization of (complex) matrices $X$ such that for any
real matrix $Y$, $det(X^2 + Y^2) \geq 0$ ?
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