<div dir="ltr">Hi Jö, <div>Thank you for your reply. I am just learning FEM. The book I am following uses cyclic numbering for the quadrilateral elements. So I thought if any way I can get cyclic numbering then I can easily verify the element stiffness matrix with book examples. Also, I spent hours to figure out the quadrature domain is not -1 to 1. It will be very helpful if you could recommend me some FEM book has lot of problem examples and follows the dune convention such as vertex numbering, quadrature domain. </div><div><br></div><div>Thank you!</div><div><br></div><div>Kind regards,</div><div>Ranjeet</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Aug 16, 2019 at 5:35 PM Jö Fahlke <<a href="mailto:jorrit@jorrit.de">jorrit@jorrit.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Am Fr, 16. Aug 2019, 13:43:40 +1000 schrieb Ranjeet Singh:<br>
> Is there any way to change the vertex numbering to cyclic order?<br>
<br>
[I'm assuming you're talking about quadrilateral elements here]<br>
<br>
No, the numbering of vertices within an element follows a fixed convention,<br>
see<br>
<a href="https://dune-project.org/doxygen/master/group__GeometryReferenceElements.html" rel="noreferrer" target="_blank">https://dune-project.org/doxygen/master/group__GeometryReferenceElements.html</a>.<br>
The reason is that there is a dimension-independent way to construct that<br>
numbering, which is difficult to do with cyclic numbering.<br>
<br>
What do you need a specific numbering for? If it is for interfacing with a<br>
library that follows a different numbering convention, the way to go is<br>
usually to write a small function to transform between the numberings for your<br>
specific case.<br>
<br>
Regards,<br>
Jö.<br>
<br>
<br>
-- <br>
Jorrit (Jö) Fahlke, Institute for Computational und Applied Mathematics,<br>
University of Münster, Orleans-Ring 10, D-48149 Münster<br>
Tel: +49 251 83 35146 Fax: +49 251 83 32729<br>
<br>
</blockquote></div>