<div dir="ltr"><div><div><div>Hi,<br><br></div>Does PETSc have automatic
differentiation capability? I'm solving an elliptic non-linear equation in which
calculating the correct Jacobian is extremely demanding. The system
doesn't converge with an approximate Jacobian. Is there any SNES solver I should try which doesn't use a Jacobian?<br><br></div>Thanks,<br></div>Harshad</div>