Dmitry, On Aug 12, 2012, at 3:13 AM, Dmitry Karpeev <[email protected]> wrote:
> On Sat, Aug 11, 2012 at 6:36 PM, Subramanya Gautam Sadasiva > <[email protected]> wrote: > Hi, > I was trying the snes solver on the obstacle problem by modifying > miscellaneous ex 7 and I get only linear convergence times.Is this what is > expected from the virs solver? > Yes, in the sense that you can't expect Newton's typical quadratic > convergence: you are not using Newton's method in the usual sense, > since the linear (and, in a sense, the nonlinear) problem you are solving > changes every time the coincidence set changes. You see this is really bad for a case like mine where essentially I am solving a quadratic problem with box constraints (Jac and Constraints are constant during each solve). Is there anything we can do to use this structure shouldn't we be able to get a quadratic convergence ? Thanks, Ata > > Dmitry. > THanks, > Subramanya > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Libmesh-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
