<div dir="ltr"><div>Any references on this topic except the users manual? I am interested in mathematics theory on this topic.<br><br></div>Fande Kong,<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Sep 23, 2016 at 9:58 AM, Jed Brown <span dir="ltr"><<a href="mailto:jed@jedbrown.org" target="_blank">jed@jedbrown.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">丁老师 <<a href="mailto:ztdepyahoo@163.com">ztdepyahoo@163.com</a>> writes:<br>
<br>
> Dear friends:<br>
> In the projection method for the solution of incompressible flow, a pressure equation with four neuman bcs need to be solved.<br>
> but the pressure matrix is singular. it gives divergence solution. how to solve this kind of equations.<br>
<br>
See the users manual section on solving singular systems.<br>
</blockquote></div><br></div>