Hi, I am testing my hand coded jacobian matrix in multi processors with the option "-snes_type test -snes_test_display", and I find that 1) my hand coded jacobian is different from the finite difference jacobian running with 2 processors. But 2) my jacobian is the same as the finite difference jacobian matrix running with 1 single processor. Also 3) my hand coded jacobian with 1 processor is the same as my hand coded jacobian with 2 processors.
Where could be wrong about multiprocessors' jacobian matrix? Thanks very much! -- (Rebecca) Xuefei YUAN Department of Applied Physics and Applied Mathematics Columbia University Tel:917-399-8032 www.columbia.edu/~xy2102
