<meta http-equiv="content-type" content="text/html; charset=utf-8"><span class="Apple-style-span" style="font-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; color: rgb(68, 68, 68); ">I actually prefer the model where a geometric object (e.g., a DA) controls the restriction (e.g., DAGlobalToLocalBegin, etc).</span><br>
<br><div class="gmail_quote">On Tue, Dec 7, 2010 at 2:29 PM, Dmitry Karpeyev <span dir="ltr"><<a href="mailto:dkarpeev@gmail.com">dkarpeev@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Yes, but how is the local form defined? Do you suggest that every Vec carry a scatter from the global to the local form?<div>That appears to be a necessarily geometric (maybe in the abstract sense) notion of restricting to some subdomain, which</div>
<div>might involve degrees of freedom not currently owned locally, and which become "ghosts".<div><div></div><div class="h5"><br><br><div class="gmail_quote">On Tue, Dec 7, 2010 at 2:24 PM, Jed Brown <span dir="ltr"><<a href="mailto:jed@59a2.org" target="_blank">jed@59a2.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="gmail_quote">On Tue, Dec 7, 2010 at 21:20, Barry Smith <span dir="ltr"><<a href="mailto:bsmith@mcs.anl.gov" target="_blank">bsmith@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">
In other words all parallel Vecs could have related local forms and the model is "give me local form Vec", scatter to/from local form vec etc?</blockquote></div><br></div><div>The only consequence I can think of is that simultaneously manipulating the global and local forms could not be allowed (in a manageable way). But I think any need to do that is an obscure edge case.</div>
<div><br></div><font color="#888888"><div>Jed</div>
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