Dear all, Now I want to solve a complex linear system arise in EM problems. And I also want to use TAO to solve a optimization problem simultaneously. So I must solve this complex linear system via its equivalent real form. To the best of my knowledge, the nested matrix and vector and fieldsplit preconditioner can do this. But I don't know how to setup the fieldsplit preconditioner. Does anyone have such experiences?
BTW, I fount that the BCGS solver does not support nested vector because it does not have an axpbypcz operator. Any help will be appreciated. Thanks in advance. Ce Qin
