As we all know, the conjugate of a function for a vector $\textbf{x}$ is $$ f^*(\textbf{y})=sup(\textbf{y}^T\textbf{x}-f(\textbf{x})) $$ what's the conjugate of a function for a matrix $\textbf{X}$? what's the $f^*(\textbf{Y})$?
2026-05-04 08:54:45.1777884885
What's the conjugate of a matrix function?
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