[Gmsh] sparsity pattern for FE applications

Christophe Geuzaine cgeuzaine at ulg.ac.be
Wed Nov 12 20:13:51 CET 2008

Umut Tabak wrote:
> Dear all and developers,
> When using GMSH generated meshes for my FE system matrix generation, I 
> realized that the system matrices assembled are quite sparse(there can 
> sometimes be quite some element far from the main diagonal of my system 
> matrices). Is there any plan to improve this, or is there already a 

There are many different uses of finite element meshes... so we choose 
not to "optimize" the numbering for any specific one.

You should run a renumbering algorithm (google for "reverse cuthill 
mckee") in your solver.

> workaround for this(I read in the manual that GMSH is not designed as an 
> industrial strength mesh generator however.)
> Thanks for the info.

Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science

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