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<DIV><FONT color=#0000ff size=3 face=Verdana>petsc teams,</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>for following definitions:</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>double precision u(n)</FONT></DIV>
<DIV><FONT color=#0000ff size=3>Vec v</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>then, how can I actualize mutual updating
between u(n) and v?</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>for example, when u(i) has changed, v will be
updated, vice versa.</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>thanks very much,</FONT></DIV>
<DIV><FONT color=#0000ff size=3></FONT> </DIV>
<DIV><FONT color=#0000ff size=3>leping</FONT></DIV>
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