On Aug 26, 2008, at 9:27 AM, David Knezevic wrote: > But the L2, H1 etc errors in ExactSolution are computed using > quadrature > rules, so they are just approximations as well.
They are not approximations if both your FE solution and the analytic solution you are comparing against can be integrated exactly by the quadrature rule you choose. Otherwise, yep, you're right... it's an approximation. Definitely in the case of comparing two different FE solutions together it's almost always an approximation, unless both solutions have the exact same mesh.... because otherwise you are trying to integrate piecewise continuous functions with Gaussian quadrature rules.... which we all know isn't quite right... but if you squint a little it looks right ;-) Derek ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
