<div dir="ltr"><div><div><div><div><div>Hi,<br></div><div>Greetings to the team! I am currently using PETSc for my research. Here is a brief description of my problem and my query <br></div>a) I have a set a points distributed on a 3 dimensional lattice. <br>
b) Corresponding to each point in this set, 7 odes are defined. <br>c) Of these 7 odes, 6 are uncoupled but one is coupled to nearest neighbors. <br>d) To integrate the odes I am using PETSc's DMDA and TS. But my application needs implicit as well as locally high order solver. I am looking for an implicit RK4 type method. Does PETSc have an IRK4 support or equivalent?<br>
</div>e) Suppose I want to build my own implicit time stepper. Should I imitate ex2.c of SNES solver?<br></div><div></div>Thanks<br></div>Amlan<br></div>IISER Pune, India<br></div>