# Just Launched: You can now import projects and releases from Google Code onto SourceForge

We are excited to release new functionality to enable a 1-click import from Google Code onto the Allura platform on SourceForge. You can import tickets, wikis, source, releases, and more with a few simple steps.

## [Libmesh-users] tensor calculation

 [Libmesh-users] tensor calculation From: li pan - 2007-04-25 13:48:43 ```Dear friends, I have again on mathematic question, which I can solve by myself. Can anyone tell me how to transform the following three terms div ( delta_ij*delta_kl*U_lk ) + div ( delta_ik*delta_jl*U_lk ) + div ( delta_il*delta_jk*U_lk ) into: grad(div(U)) + laplace(U) + div(grad(U)) where, delta_ij: Kronecker delta U_lk partial differential of U l,k=1,2,3 This has nothing to do with libmesh. But I really want to understand it. thanx pan __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ```

 [Libmesh-users] tensor calculation From: li pan - 2007-04-25 13:48:43 ```Dear friends, I have again on mathematic question, which I can solve by myself. Can anyone tell me how to transform the following three terms div ( delta_ij*delta_kl*U_lk ) + div ( delta_ik*delta_jl*U_lk ) + div ( delta_il*delta_jk*U_lk ) into: grad(div(U)) + laplace(U) + div(grad(U)) where, delta_ij: Kronecker delta U_lk partial differential of U l,k=1,2,3 This has nothing to do with libmesh. But I really want to understand it. thanx pan __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ```
 Re: [Libmesh-users] tensor calculation From: li pan - 2007-04-25 17:08:17 ```Hi, I solved the problem by myself at last. c. u. pan --- li pan wrote: > Dear friends, > I have again on mathematic question, which I can > solve > by myself. Can anyone tell me how to transform the > following three terms > > div ( delta_ij*delta_kl*U_lk ) + > div ( delta_ik*delta_jl*U_lk ) + > div ( delta_il*delta_jk*U_lk ) > > into: > grad(div(U)) + laplace(U) + div(grad(U)) > where, > delta_ij: Kronecker delta > U_lk partial differential of U l,k=1,2,3 > > This has nothing to do with libmesh. But I really > want > to understand it. > > thanx > > pan > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 > express and take > control of your XML. No limits. Just data. Click to > get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > Libmesh-users mailing list > Libmesh-users@... > https://lists.sourceforge.net/lists/listinfo/libmesh-users > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ```