Barry, Do you recall the paper or detailed Chebyshev algorithm that you implemented the Chebyshev in petsc? I added 'hybrid' to it, which is not correct. Jie is helping to fix it. Having an original algorithm would help. On Tue, May 22, 2012 at 1:21 PM, Jie Chen <[email protected]> wrote:

...

Then do you know who wrote the code? Hong said it was you.

It was written in the 90s, before version control history.

Sorry, my mistake. I recall that Barry said that he wrote it when Jed was in dia... ;-( Hong

...

Hong is trying to modify the code but there is something wrong. I am helping to see what is the problem. The code itself is fine.

Hard to speculate without more than "something wrong".

...

Jie

----- Original Message ----- From: "Jed Brown" <[email protected]> To: "Jie Chen" <[email protected]>, "For users of the development version of PETSc" <[email protected]> Sent: Tuesday, May 22, 2012 1:18:07 PM Subject: Re: cheby.c

On Tue, May 22, 2012 at 12:37 PM, Jie Chen < [email protected] > wrote:

Jed, I am reading your implementation of the chebyshev code. The algorithm does not seem to be the same as the version I am familiar with. Did you implement it according to some paper or book?

I didn't write it.

What do you find strange?