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May 12, 2003, 02:54 |
Implementing an EBE Preconditioner
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#1 |
Guest
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Hi,
Having read Saad's "Iterative Methods" and Netlibs "Templates", I'm still unclear on how to implement an Incomplete Lower Upper factorization on an element-by-element basis to precondition (M) a sparse linear system (A). I'd found coded examples on how to preform an ILU(0) factorization for a general nxn matix. However, I'm not sure how to implement this for iterative methods requiring: solve w from M*w=A, or w=M^(-1)*v, for example. How can this be done without assembling a global matrix for the preconditioner M, or then finding the global matrix inverse? Any help would be much appreciated. Thanks in advance! -CS |
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