Strength matrix #1234
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Strength matrix #1234
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* New routines to build an auxillliary M-matrix from A and used to construct S. * New user routine to access this capability with various options.
…e entries weighted by entries in A
…s to stored complexity info.
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Hi @oseikuffuor1 and @waynemitchell . This branch is now up to date with master. I removed the cogent proxy from the Makefile (it doesn't build currently, and we probably don't want it in hypre anyway) and I added a one line description of the strength option to The code doesn't work correctly for the matrices I am testing, but I'm pretty sure it's because the matrices are negative definite and the current code looks for positive off-diagonal entries instead of same-sign-as-diagonal. I'll try to fix that. |
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Thanks Rob!
…-Daniel
Daniel Osei-Kuffuor
Center for Applied Scientific Computing
Lawrence Livermore National Laboratory
Livermore, CA 94550
Mail Code: L-561
Phone: 925-422-7683
Email: ***@***.******@***.***>
________________________________
From: Rob Falgout ***@***.***>
Sent: Monday, February 10, 2025 1:48 PM
To: hypre-space/hypre ***@***.***>
Cc: Osei-Kuffuor, Daniel ***@***.***>; Mention ***@***.***>
Subject: Re: [hypre-space/hypre] Strength matrix (PR #1234)
Hi @oseikuffuor1<https://urldefense.us/v3/__https://github.com/oseikuffuor1__;!!G2kpM7uM-TzIFchu!xSkLDougQ-EqEZF3Jor9tfaYqzr3qs3KPXN-Qz9s30ihjC1TwxfGOiobKyhSuO7CYrjmN_9GjbP4obmMWSK1brpShnyUoQ$> and @waynemitchell<https://urldefense.us/v3/__https://github.com/waynemitchell__;!!G2kpM7uM-TzIFchu!xSkLDougQ-EqEZF3Jor9tfaYqzr3qs3KPXN-Qz9s30ihjC1TwxfGOiobKyhSuO7CYrjmN_9GjbP4obmMWSK1brqO9iejBQ$> . This branch is now up to date with master. I removed the cogent proxy from the Makefile (it doesn't build currently, and we probably don't want it in hypre anyway) and I added a one line description of the strength option to ij.c (it will need to be updated at some point).
The code doesn't work correctly for the matrices I am testing, but I'm pretty sure it's because the matrices are negative definite and the current code looks for positive off-diagonal entries instead of same-sign-as-diagonal. I'll try to fix that.
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Okay, this seems to fix the negative diagonal case. The strength measure doesn't really help with the matrices I am testing though. :( This deserves a much closer investigation, of course. |
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This branch implements a new strength measure idea.