Faster inverse of a lower triangular matrix than inv(A)?
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Dear All,
I have a sparse lower triangular matrix A. I want to obtain the inverse of A. A has a size of 6000 X 6000. I find inv(A) takes more than 5 seconds. I do not know if there is a faster approach to get the inverse of A?
Thanks. Bei
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Torsten
2018년 10월 19일
See here
https://de.mathworks.com/matlabcentral/answers/332233-updating-inverse-of-a-lower-triangular-matrix
why it is a bad idea to invert a lower triangular matrix.
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