OK. Thank you very much.<br><br><div class="gmail_quote">On Thu, Jan 5, 2012 at 5:15 PM, Jed Brown <span dir="ltr"><<a href="mailto:jedbrown@mcs.anl.gov">jedbrown@mcs.anl.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im"><div class="gmail_quote">On Thu, Jan 5, 2012 at 07:31, behzad baghapour <span dir="ltr"><<a href="mailto:behzad.baghapour@gmail.com" target="_blank">behzad.baghapour@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>I used SNES with LS cubic and basic. In some cases the cubic model can stabilised the global convergence BUT in some case it fails while the basic model has given better convergence !!!<br></div></blockquote>
</div><br></div><div>Yes, this happens sometimes. Which is better depends on the local shape of the nonlinearity. Just try both and use whichever performs better for your problem.</div>
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