<div>Hi,</div>
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<div>I found this link when doing a PETSc search.It is 30mins online lecture which introduces and explains the use of PETSc on solving the laplace eqn. Hope it's useful to new users</div>
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<div><a href="http://infostream.rus.uni-stuttgart.de/lec/307/537/real/">http://infostream.rus.uni-stuttgart.de/lec/307/537/real/</a></div>