guerom00
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Hello 
I scratch my head on trying to express \partial_{x}[\det(\textbf{1}-\textbf{M})] , where \textbf{M} is a square matrix whose elements depend on x, as an expression involving \textbf{M} and/or \partial_{x}\textbf{M}.
For instance, I have painfully noticed that it is not equal to \det(\textbf{1}-\partial_{x}\textbf{M})
Any help would be much apprciated
TIA

I scratch my head on trying to express \partial_{x}[\det(\textbf{1}-\textbf{M})] , where \textbf{M} is a square matrix whose elements depend on x, as an expression involving \textbf{M} and/or \partial_{x}\textbf{M}.
For instance, I have painfully noticed that it is not equal to \det(\textbf{1}-\partial_{x}\textbf{M})

Any help would be much apprciated
