Ya, bcgs worked, solving my own problem. But it doesn't seem to work with the test examples like ex1f or ex2f.<br><br>
<div><span class="gmail_quote">On 4/9/07, <b class="gmail_sendername">Boyce Griffith</b> <<a href="mailto:griffith@cims.nyu.edu">griffith@cims.nyu.edu</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"><br><br>Barry Smith wrote:<br>><br>> On Mon, 9 Apr 2007, Ben Tay wrote:<br>>> 3. why can't I use bcgs or bicg with hypre?
<br>><br>> hypre doesn't support applying the transpose of the preconditioner that<br>> bcgs and bicg need?<br><br>I don't believe that Bi-CGSTAB (-ksp_type bcgs) uses matrix or<br>preconditioner transposes. On the other hand, bicg does.
<br><br>-- Boyce<br><br></blockquote></div><br>