[petsc-users] How to use multigrid?

[w_ang_temp]

Sincerely thank you for your advices. Thanks Matthew, too. I will try my best.

                                                                      Jim





>On 2012-11-09 23:44:45，"Jed Brown" <jedbrown at mcs.anl.gov> 写道：

>>On Fri, Nov 9, 2012 at 9:28 AM, w_ang_temp <w_ang_temp at 163.com> wrote:

>>By the way, as a graduate student, I find that it is difficult to write a paper just using PETSc
>>to deal with a large problem. Because it seems that there is no an innovative idea by just using
>>the available things.


>Reimplementing an existing method is not new either. Now there are many papers that reimplement existing methods under a new name, without citing its >existing use, and usually with less rigorous analysis than earlier work. This is caused either by stubborn ignorance or intentional deception. It's not science >and only survives due to negligent reviewers.


>Creating genuinely new methods that solve meaningful problems and work better than existing methods is Hard. To start with, it's important to understand >the capabilities and limitations of existing methods. Unless your intended research area is pretty focused, expect to read at least 1000 papers and write >dozens of experimental codes. You might be able to rely on your advisor to accelerate this process, but advisors are not always right.
 
>>It is also not easy to get something new based on the src of PETSc.


>If you work in an application area, focus on the modeling and method components specific to your problem. Build the special ingredients using PETSc and >let the library do the rest of the work. Better understanding of methods will help you do this faster and in more powerful ways.
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