Lizao Li

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Name Lizao Li
Member for 1 year
Seen Apr 22 at 15:00
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Location University of Minnesota, Twin Cities
Age 26
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Feb
4
awarded  Commentator
Feb
4
comment Numerical linear algebra: how to compute $B^TC^{−1}B$ efficiently
I would suggest first check what is wrong with CG. If for the bigger systems, it takes the similar number of iterations to convergence compared to the smaller system, then I don't know anything you can do about it. But if the bigger system takes a lot more iterations, you should look for additoinal structures of the system and find a good preconditioner.