I am tryin to solve PDE and need to use PETSc and need yo know if using it with problem statement or should I use varf statement. the problem is when I use varf statement the results differs than using problem statement and I am sure that results obtained from problem statement is correct hereunde…

Diffrence in results between varf and problem statment

julienG (Julien) June 5, 2024, 4:40am 2

You have to be careful with signs of the rhs when passing from problem to varf. see discussion in this thread

Topic		Replies	Views
Question about PETSc General Discussion	8	255	August 30, 2023
Difficulty with PETSc in solving vectorized problem General Discussion	1	186	November 2, 2023
Problem vs varf General Discussion	3	46	September 30, 2024
Different solutions when using 'problem' and 'varf' keywords General Discussion	3	178	February 22, 2024
Linear problem depending on a nonlinear solution and an eigenmode, in parallel General Discussion	6	305	April 4, 2022