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I need your help please.

I have a block matrix P=[a b ; 0 d], which is inversable.

if f belongs to the ideal of the matrix, how do I prove that

f=[itex]\sum[/itex]g[itex]_{ij}[/itex]x[itex]_{ij}[/itex]

while g[itex]_{ij}[/itex] are regular functions above the space of inversable matrix?

thank you!

Karin

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# Ideal of an inversable triangular matrix

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