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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple style='word-wrap: break-word;-webkit-nbsp-mode: space;-webkit-line-break: after-white-space'><div class=WordSection1><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Mark, Hong,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Lets make it simpler. I fixed my partitiotion bug (in metis). Now there is a equidivision of cells.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>To simplify even further, lets run a much smaller case : with 6 cells (equations) in SERIAL. This one crashes. The out and the ksp_view_binary files are attached.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>RAvi. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> petsc-dev-bounces@mcs.anl.gov [mailto:petsc-dev-bounces@mcs.anl.gov] <b>On Behalf Of </b>Mark F. Adams<br><b>Sent:</b> Friday, January 13, 2012 3:00 PM<br><b>To:</b> For users of the development version of PETSc<br><b>Subject:</b> Re: [petsc-dev] boomerAmg scalability<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Well, we do have a bug here. It should work with zero elements on a proc, but the code is being actively developed so you are really helping us to find these cracks.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>If its not too hard it would be nice if you could give use these matrices, before you fix it, so we can fix this bug. You can just send it to Hong and I (cc'ed).<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Mark<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><div><p class=MsoNormal>On Jan 13, 2012, at 12:16 PM, Ravi Kannan wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Mark,Hong</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for the observation w.r.t the proc 0 having 2 equations. This is a bug from our end. We will fix it and get back to you if needed.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ravi.</span><o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial'><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span class=apple-converted-space><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> </span></span><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><a href="mailto:petsc-dev-bounces@mcs.anl.gov">petsc-dev-bounces@mcs.anl.gov</a><span class=apple-converted-space> </span>[mailto:petsc-dev-bounces@mcs.anl.gov]<span class=apple-converted-space> </span><b>On Behalf Of<span class=apple-converted-space> </span></b>Mark F. Adams<br><b>Sent:</b><span class=apple-converted-space> </span>Thursday, January 12, 2012 10:03 PM<br><b>To:</b><span class=apple-converted-space> </span>Hong Zhang<br><b>Cc:</b><span class=apple-converted-space> </span>For users of the development version of PETSc<br><b>Subject:</b><span class=apple-converted-space> </span>Re: [petsc-dev] boomerAmg scalability</span><o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal>Ravi, can you run with -ksp_view_binary? This will produce two files.<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Hong, ex10 will read in these files and solve them. I will probably not be able to get to this until Monday.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Also, this matrix has just two equations on proc 0 and and about 11000 on proc 1 so its is strangely balanced, in case that helps ...<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Mark<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><div><p class=MsoNormal>On Jan 12, 2012, at 10:35 PM, Hong Zhang wrote:<o:p></o:p></p></div></div><div><p class=MsoNormal><br><br><br><o:p></o:p></p></div><div><p class=MsoNormal>Ravi,<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>I need more info for debugging. Can you provide a simple stand alone code and matrices in petsc<o:p></o:p></p></div></div><div><div><p class=MsoNormal>binary format that reproduce the error?<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>MatTransposeMatMult() for mpiaij is a newly developed subroutine - less than one month old <o:p></o:p></p></div></div><div><div><p class=MsoNormal>and not well tested yet :-(<o:p></o:p></p></div></div><div><div><p class=MsoNormal>I used petsc-dev/src/mat/examples/tests/ex94.c for testing.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Thanks,<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'>Hong<o:p></o:p></p><div><div><p class=MsoNormal>On Thu, Jan 12, 2012 at 9:17 PM, Mark F. Adams <<a href="mailto:mark.adams@columbia.edu">mark.adams@columbia.edu</a>> wrote:<o:p></o:p></p></div><div><div><p class=MsoNormal>It looks like the problem is in MatTransposeMatMult and Hong (cc'ed) is working on it.<o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>I'm hoping that your output will be enough for Hong to figure this out but I could not reproduce this problem with any of my tests.<o:p></o:p></p></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>If Hong can not figure this out then we will need to get the matrix from you to reproduce this.<o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='color:#888888'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span class=hoenzb><span style='color:#888888'>Mark</span></span><o:p></o:p></p></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><div><p class=MsoNormal>On Jan 12, 2012, at 6:25 PM, Ravi Kannan wrote:<o:p></o:p></p></div></div><div><p class=MsoNormal><br><br><br><o:p></o:p></p></div><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Mark,</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Any luck with the gamg bug fix?</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ravi.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div style='border:none;border-top:solid windowtext 3.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a> [mailto:<a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a>] <b>On Behalf Of </b>Mark F. Adams<br><b>Sent:</b> Wednesday, January 11, 2012 1:54 PM<br><b>To:</b> For users of the development version of PETSc<br><b>Subject:</b> Re: [petsc-dev] boomerAmg scalability</span><o:p></o:p></p></div></div></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>This seems to be dying earlier than it was last week, so it looks like a new bug in MatTransposeMatMult.<o:p></o:p></p></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal>Mark<o:p></o:p></p></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><div><p class=MsoNormal>On Jan 11, 2012, at 1:59 PM, Matthew Knepley wrote:<o:p></o:p></p></div></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> <o:p></o:p></p></div><div><div><p class=MsoNormal>On Wed, Jan 11, 2012 at 12:23 PM, Ravi Kannan <<a href="mailto:rxk@cfdrc.com" target="_blank">rxk@cfdrc.com</a>> wrote:<o:p></o:p></p></div></div><div><blockquote style='border:none;border-left:solid windowtext 3.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Mark,</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I downloaded the dev version again. This time, the program crashes even earlier. Attached is the serial and parallel info outputs.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Could you kindly take a look.</span><o:p></o:p></p></div></div></div></div></blockquote><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal>It looks like this is a problem with MatMatMult(). Can you try to reproduce this using KSP ex10? You put<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal>your matrix in binary format and use -pc_type gamg. Then you can send us the matrix and we can track<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal>it down. Or are you running an example there?<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> Thanks,<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> Matt<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><blockquote style='border:none;border-left:solid windowtext 3.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ravi.</span><o:p></o:p></p></div></div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div><div><div style='border:none;border-top:solid windowtext 3.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a> [mailto:<a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a>] <b>On Behalf Of </b>Mark F. Adams<br><b>Sent:</b> Monday, January 09, 2012 3:08 PM</span><o:p></o:p></p></div></div><div><div><div><div><p class=MsoNormal><br><b>To:</b> For users of the development version of PETSc<br><b>Subject:</b> Re: [petsc-dev] boomerAmg scalability<o:p></o:p></p></div></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><p class=MsoNormal>Yes its all checked it, just pull from dev.<o:p></o:p></p></div></div><div><div><div><p class=MsoNormal>Mark<o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><div><div><div><p class=MsoNormal>On Jan 9, 2012, at 2:54 PM, Ravi Kannan wrote:<o:p></o:p></p></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt'> <o:p></o:p></p><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Mark,</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for your efforts.</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Do I need to do the install from scratch once again? Or some particular files (check out gamg.c for instance)?</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks,</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Ravi.</span><o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div><div><div style='border:none;border-top:solid windowtext 3.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a> [mailto:<a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a>] <b>On Behalf Of </b>Mark F. Adams<br><b>Sent:</b> Friday, January 06, 2012 10:30 AM<br><b>To:</b> For users of the development version of PETSc<br><b>Subject:</b> Re: [petsc-dev] boomerAmg scalability</span><o:p></o:p></p></div></div></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><p class=MsoNormal>I think I found the problem. You will need to use petsc-dev to get the fix.<o:p></o:p></p></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div><div><div><div><div><div><p class=MsoNormal>Mark<o:p></o:p></p></div></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><div><div><p class=MsoNormal>On Jan 6, 2012, at 8:55 AM, Mark F. Adams wrote:<o:p></o:p></p></div></div></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> <o:p></o:p></p></div><div><div><div><div><p class=MsoNormal>Ravi, I forgot but you can just use -ksp_view_binary to output the matrix data (two files). You could run it with two procs and a Jacobi solver to get it past the solve, where it writes the matrix (I believe).<o:p></o:p></p></div></div></div><div><div><div><div><p class=MsoNormal>Mark<o:p></o:p></p></div></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><div><div><div><p class=MsoNormal>On Jan 5, 2012, at 6:19 PM, Ravi Kannan wrote:<o:p></o:p></p></div></div></div></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> <o:p></o:p></p></div><div><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Just send in another email with the attachment.</span><o:p></o:p></p></div></div></div></div><div><div><div><div><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span><o:p></o:p></p></div></div></div></div><div style='border:none;border-top:solid windowtext 3.0pt;padding:3.0pt 0in 0in 0in;border-width:initial;border-color:initial;border-width:initial;border-color:initial;border-width:initial;border-color:initial;border-width:initial;border-color:initial'><div><div><div><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a> [mailto:<a href="mailto:petsc-dev-bounces@mcs.anl.gov" target="_blank">petsc-dev-bounces@mcs.anl.gov</a>] <b>On Behalf Of </b>Jed Brown<br><b>Sent:</b> Thursday, January 05, 2012 5:15 PM<br><b>To:</b> For users of the development version of PETSc<br><b>Subject:</b> Re: [petsc-dev] boomerAmg scalability</span><o:p></o:p></p></div></div></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div><div><div><div><div><div><p class=MsoNormal>On Thu, Jan 5, 2012 at 17:12, Ravi Kannan <<a href="mailto:rxk@cfdrc.com" target="_blank">rxk@cfdrc.com</a>> wrote:<o:p></o:p></p></div></div></div></div><div><div><div><div><p class=MsoNormal>I have attached the verbose+info outputs for both the serial and the parallel (2 partitions). NOTE: the serial output at some location says PC=Jacobi! Is it implicitly converting the PC to a Jacobi?<o:p></o:p></p></div></div></div></div></div><div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div><div><div><div><div><div><p class=MsoNormal>Looks like you forgot the attachment.<o:p></o:p></p></div></div></div></div></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div></div></blockquote></div><div><div><p class=MsoNormal><br><br clear=all><o:p></o:p></p></div></div><div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><div><p class=MsoNormal>-- <br>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener<o:p></o:p></p></div></div></div><div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></div></body></html>