[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
how to get all the singular values of the matrix?
- To: petsc-users@xxxxxxxxxxx
- Subject: how to get all the singular values of the matrix?
- From: Yujie <recrusader@xxxxxxxxx>
- Date: Mon, 14 Jan 2008 13:23:31 +0800
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to:subject:mime-version:content-type; bh=BerURnwte/miE072Sn9Wly9PO/EF0M4mfiydVyiVCmk=; b=dX3KMsvyoCbjLL7qFMjRCMnTyUtZB4Gk9D71YNHd+U9Y4ooX7O5mlRjftwwmPd7yOGDiKFN1GM+W7wkOE+sIVSlY7cB7erHf/9f0sF/LC9FaKIWDB0uW+qa5Q14Kdx0YZS0JZPrrAIApPNURIhGLN4mAJE9dFybtAECDQcdoUvU=
- Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type; b=pVIFy6r8vxQcH0j96TYucGu0dIh6mitun+AUfjP/rfh9LKn/iOPo9sXeOxB56YisI63zvI+matvSxRZmfRYgpAefzhwU8AAirHooAraJrgPEjlYroB1jFPOP/KmUXQUDwayUgkeSuh37GuWb3yVpgDUhyPGO62lhHdp2RGDB7+w=
- Reply-to: petsc-users@xxxxxxxxxxx
- Sender: owner-petsc-users@xxxxxxxxxxx
Hi, everyone
I want to select iterative methods by observing the singular values decompostion of the matrix. However, I don't know how to get all the singular values of the matrix in PETSc. I know the command "-ksp_monitor_singular_value" may get the max and min singular values at each iteration. How to get the singular values of the matrix I want to solve? In addition, when I use the preconditioned iterative method, how to get the singular values of the preconditioned iterative operator?
thanks a lot.
Regards,
Yujie