25   Mat          A, A_save, B, C, P, C1, R;  in main()  local
146   PetscCall(MatCreate(PETSC_COMM_WORLD, &P));  in main()
147   PetscCall(MatSetSizes(P, PETSC_DECIDE, PETSC_DECIDE, PM, PN));  in main()
148   PetscCall(MatSetType(P, MATAIJ));  in main()
149   PetscCall(MatSeqAIJSetPreallocation(P, nzp, NULL));  in main()
150   PetscCall(MatMPIAIJSetPreallocation(P, nzp, NULL, nzp, NULL));  in main()
151   PetscCall(MatGetOwnershipRange(P, &rstart, &rend));  in main()
158     PetscCall(MatSetValues(P, 1, &i, nzp, idxn, a, ADD_VALUES));  in main()
160   PetscCall(MatAssemblyBegin(P, MAT_FINAL_ASSEMBLY));  in main()
161   PetscCall(MatAssemblyEnd(P, MAT_FINAL_ASSEMBLY));  in main()
163   PetscCall(MatTranspose(P, MAT_INITIAL_MATRIX, &R));  in main()
164   PetscCall(MatConvert(P, mattype, MAT_INPLACE_MATRIX, &P));  in main()
166   PetscCall(MatSetFromOptions(P));  in main()
173     PetscCall(MatProductCreate(P, B, NULL, &C));  in main()
186       PetscCall(MatTransposeMatMultEqual(P, B, C, mcheck, &flg));  in main()
191       PetscCall(MatTransposeMatMult(P, B, MAT_INITIAL_MATRIX, PETSC_DETERMINE, &C));  in main()
192       PetscCall(MatTransposeMatMult(P, B, MAT_REUSE_MATRIX, PETSC_DETERMINE, &C));  in main()
225       PetscCall(MatMatMult(B, P, MAT_INITIAL_MATRIX, PETSC_DETERMINE, &C1));  in main()
239     PetscCall(MatProductCreate(A, P, NULL, &C));  in main()
247     PetscCall(MatPtAPMultEqual(A, P, C, mcheck, &flg));  in main()
251     PetscCall(MatPtAPMultEqual(A, P, C, mcheck, &flg));  in main()
256     PetscCall(MatPtAP(A, P, MAT_INITIAL_MATRIX, PETSC_DETERMINE, &C));  in main()
257     PetscCall(MatPtAPMultEqual(A, P, C, mcheck, &flg));  in main()
265       PetscCall(MatPtAP(A, P, MAT_REUSE_MATRIX, PETSC_DETERMINE, &C));  in main()
267     PetscCall(MatPtAPMultEqual(A, P, C, mcheck, &flg));  in main()
312   PetscCall(MatDestroy(&P));  in main()