How can I efficiently check if a tridiagonal system with 1's in diagonal is ill-conditioned or not ? The common way is to get the ratio of largest and smallest singular values and see if its greater than the precision of matrix entries. Is there any other way I can do this ? My matrix is huge so it will take lots of time and RAM to computer Singular values.
2026-03-27 08:49:17.1774601357
Check for Ill Conditioned matrix
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