46   if (ark->is_slow) PetscCall(VecISCopy(Y, ark->is_fast, SCATTER_FORWARD, X));  in SNESTSFormFunction_ARKIMEX_FastSlowSplit()
67   if (ark->is_slow) PetscCall(VecISCopy(Y, ark->is_fast, SCATTER_FORWARD, X));  in SNESTSFormJacobian_ARKIMEX_FastSlowSplit()
147       if (ark->is_slow) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
148         PetscCall(VecGetSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
150         PetscCall(VecRestoreSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
167       if (ark->is_slow) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
168         PetscCall(VecGetSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
170         PetscCall(VecRestoreSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
182       if (ark->is_slow) {  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
183         PetscCall(VecGetSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
185         PetscCall(VecRestoreSubVector(X, ark->is_slow, &Xslow));  in TSEvaluateStep_ARKIMEX_FastSlowSplit()
238     PetscCall(VecGetSubVector(ts->vec_sol, ark->is_slow, &Xslow));  in TSStep_ARKIMEX_FastSlowSplit()
319           if (ark->is_slow) PetscCall(VecCopy(i > 0 ? Y[i - 1] : ts->vec_sol, ark->Y_snes));  in TSStep_ARKIMEX_FastSlowSplit()
369       if (ark->is_slow) {  in TSStep_ARKIMEX_FastSlowSplit()
371         PetscCall(VecGetSubVector(Y[i], ark->is_slow, &Yslow));  in TSStep_ARKIMEX_FastSlowSplit()
373         PetscCall(VecRestoreSubVector(Y[i], ark->is_slow, &Yslow));  in TSStep_ARKIMEX_FastSlowSplit()
416   PetscCall(TSRHSSplitGetIS(ts, "slow", &ark->is_slow));  in TSSetUp_ARKIMEX_FastSlowSplit()
418 …PetscCheck(ark->is_slow || ark->is_fast, PetscObjectComm((PetscObject)ts), PETSC_ERR_USER, "Must s…  in TSSetUp_ARKIMEX_FastSlowSplit()
424 …if (ark->extrapolate && ark->is_slow) { // need to resize these vectors if the fast subvectors is …  in TSSetUp_ARKIMEX_FastSlowSplit()
430 …if (ark->is_fast && ark->is_slow) PetscCall(VecDuplicate(ts->vec_sol, &ark->Y_snes)); // need an a…  in TSSetUp_ARKIMEX_FastSlowSplit()
445   if (ark->is_slow) {  in TSSetUp_ARKIMEX_FastSlowSplit()
446     PetscCall(VecGetSubVector(ts->vec_sol, ark->is_slow, &Xslow));  in TSSetUp_ARKIMEX_FastSlowSplit()
448     PetscCall(VecRestoreSubVector(ts->vec_sol, ark->is_slow, &Xslow));  in TSSetUp_ARKIMEX_FastSlowSplit()
476     if (ark->is_fast && ark->is_slow) PetscCall(VecDestroy(&ark->Y_snes));  in TSReset_ARKIMEX_FastSlowSplit()