273       Mat RARt;  in main()  local
276       PetscCall(MatProductCreate(A, R, NULL, &RARt));  in main()
277       PetscCall(MatSetOptionsPrefix(RARt, "RARt_"));  in main()
278       PetscCall(MatProductSetType(RARt, MATPRODUCT_RARt));  in main()
279       PetscCall(MatProductSetAlgorithm(RARt, MATPRODUCTALGORITHMDEFAULT));  in main()
280       PetscCall(MatProductSetFill(RARt, PETSC_DETERMINE));  in main()
281       PetscCall(MatProductSetFromOptions(RARt));  in main()
282       PetscCall(MatHasOperation(RARt, MATOP_PRODUCTSYMBOLIC, &flg));  in main()
284         PetscCall(MatProductSymbolic(RARt));                        /* equivalent to MatSetUp() */  in main()
285 …PetscCall(MatSetOption(RARt, MAT_USE_INODES, PETSC_FALSE)); /* illustrate how to call MatSetOption…  in main()
286         PetscCall(MatProductNumeric(RARt));  in main()
287         PetscCall(MatProductNumeric(RARt)); /* test reuse symbolic RARt */  in main()
288         PetscCall(MatDestroy(&RARt));  in main()
291         PetscCall(MatRARt(A, R, MAT_INITIAL_MATRIX, 2.0, &RARt));  in main()
292         PetscCall(MatRARt(A, R, MAT_REUSE_MATRIX, 2.0, &RARt));  in main()
294         PetscCall(MatNormDifference(C, RARt, &norm));  in main()
299       PetscCall(MatDestroy(&RARt));  in main()