Does anyone know a formula for the inverse of a sum of two upper triangular matrices?
Apr 6, 2008 #1 Physics_wiz 224 0 Main Question or Discussion Point Does anyone know a formula for the inverse of a sum of two upper triangular matrices?
Main Question or Discussion Point Does anyone know a formula for the inverse of a sum of two upper triangular matrices?
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Apr 7, 2008 #2 HallsofIvy Science Advisor Homework Helper 41,734 893 What makes you think there is such a formula? Have you looked at the inverse of [tex]\left(\begin{array}{cc}a & b \\ 0 & c\end{array}\right)+ \left(\begin{array}{cc}x & y \\ 0 & z\end{array}\right)[/tex]?
What makes you think there is such a formula? Have you looked at the inverse of [tex]\left(\begin{array}{cc}a & b \\ 0 & c\end{array}\right)+ \left(\begin{array}{cc}x & y \\ 0 & z\end{array}\right)[/tex]?