<font size=2 face="sans-serif">Hi,</font>
<br>
<br><font size=2 face="sans-serif">I'm using TS and seeing a ":flickering"
in the output. I use</font>
<br>
<br><font size=2 face="sans-serif"> ierr=TSCreate(PETSC_COMM_WORLD,&timeStepper);</font>
<br><font size=2 face="sans-serif"> ierr=TSSetProblemType(timeStepper,TS_NONLINEAR);
</font>
<br><font size=2 face="sans-serif"> ierr=TSSetFromOptions(timeStepper);
</font>
<br><font size=2 face="sans-serif"> ierr=TSSetIFunction(timeStepper,
formOperatorImplicitTimeFunction , (void*)Ldata);</font>
<br><font size=2 face="sans-serif"> ierr=TSSetIJacobian(timeStepper,A,A,
formOperatorImplicitTimeJacobian , (void*)Ldata);</font>
<br><font size=2 face="sans-serif"> ierr=TSMonitorSet(timeStepper,SaveTSSolution,(void*)(&data),NULL);
</font>
<br>
<br><font size=2 face="sans-serif">I'm using the implicit nonlinear formulation
for an ADE, and writing the solution in the monitoring routine.</font>
<br>
<br><font size=2 face="sans-serif">If I instead write out the solution
in the IFunction routine when the residual is small I see a different (better)
solution passed in.</font>
<br>
<br><font size=2 face="sans-serif">Does this sound like a problem that's
been seen before?</font>
<br>
<br><font size=2 face="sans-serif">Thanks,</font>
<br>
<br><font size=2 face="sans-serif">MIke Henderson<br>
------------------------------------------------------------------------------------------------------------------------------------<br>
Mathematical Sciences, TJ Watson Research Center<br>
mhender@watson.ibm.com<br>
</font><a href=http://www.research.ibm.com/people/h/henderson/><font size=2 face="sans-serif">http://www.research.ibm.com/people/h/henderson/</font></a><font size=2 face="sans-serif"><br>
</font><a href=http://multifario.sourceforge.net/><font size=2 face="sans-serif">http://multifario.sourceforge.net/</font></a><font size=2 face="sans-serif"><br>
</font>