6 October 2025 6:02:43.527 PM cg_rc_test(): Fortran90 version Test cg_rc(). TEST01 Use CG_RC on the 1, -2, 1 matrix. Number of iterations was 9 Estimated error is 0.421596E-15 Loo error is 0.666134E-15 I X(I) X_EXACT(I) B(I) 1 0.780626E-16 0.00000 0.309017 2 0.309017 0.309017 -0.302487E-01 3 0.587785 0.587785 -0.575365E-01 4 0.809017 0.809017 -0.791922E-01 5 0.951057 0.951057 -0.930960E-01 6 1.00000 1.00000 -0.978870E-01 7 0.951057 0.951057 -0.930960E-01 8 0.809017 0.809017 -0.791922E-01 9 0.587785 0.587785 -0.575365E-01 10 0.309017 0.309017 -0.302487E-01 11 -0.479828E-16 0.122465E-15 0.388578E-15 12 -0.309017 -0.309017 0.302487E-01 13 -0.587785 -0.587785 0.575365E-01 14 -0.809017 -0.809017 0.791922E-01 15 -0.951057 -0.951057 0.930960E-01 16 -1.00000 -1.00000 0.978870E-01 17 -0.951057 -0.951057 0.930960E-01 18 -0.809017 -0.809017 0.791922E-01 19 -0.587785 -0.587785 0.575365E-01 20 -0.309017 -0.309017 0.302487E-01 21 -0.410262E-15 -0.244929E-15 -0.309017 TEST02 Use CG_RC to solve a linear system involving the Wathen matrix. NX = 5 NY = 4 N = 79 Number of iterations was 19 Estimated error is 0.411625E-02 Loo error is 0.385746E-04 I X(I) X_EXACT(I) B(I) 1 0.556437 0.556475 -24.2625 2 0.543591 0.543568 87.1859 3 0.588736 0.588730 -29.5042 4 0.219615 0.219605 38.8314 5 0.843835E-01 0.843891E-01 -10.9998 6 0.270900 0.270914 0.313037 7 0.817547 0.817560 15.9810 8 0.374661 0.374652 1.64085 9 0.480448 0.480464 -2.78913 10 0.421116 0.421102 46.5778 11 0.676052 0.676063 -5.36421 12 0.369120 0.369136 79.8955 13 0.786083 0.786096 154.426 14 0.409720E-01 0.409762E-01 19.4576 15 0.119316 0.119312 -1.46368 16 0.144254 0.144265 26.1629 17 0.673149 0.673157 51.8070 18 0.156471 0.156471 -57.4654 19 0.705353 0.705353 196.561 20 0.553480 0.553475 -71.0498 21 0.240677 0.240671 96.1690 22 0.184852 0.184860 -50.0386 23 0.193949 0.193950 70.9766 24 0.993349 0.993346 1.21014 25 0.116725 0.116724 13.2102 26 0.331844 0.331836 -28.9271 27 0.131123 0.131122 79.3645 28 0.170974 0.170976 -27.5953 29 0.742969 0.742982 108.008 30 0.321251 0.321260 147.077 31 0.710632 0.710622 148.323 32 0.512735 0.512749 107.442 33 0.478218 0.478227 83.4170 34 0.684047 0.684038 63.5602 35 0.230684 0.230686 -36.1620 36 0.645503 0.645489 146.829 37 0.722559E-01 0.722530E-01 -75.5758 38 0.154441 0.154441 93.4129 39 0.584647E-01 0.584637E-01 -78.2288 40 0.667987 0.667977 177.855 41 0.168370 0.168374 -62.8170 42 0.114524 0.114517 47.2372 43 0.851269 0.851269 -32.8111 44 0.576786 0.576789 137.050 45 0.767709 0.767712 -24.3994 46 0.566800E-01 0.566820E-01 27.8461 47 0.283477 0.283478 84.6713 48 0.414222 0.414229 129.170 49 0.952123 0.952124 152.181 50 0.292284 0.292286 92.4988 51 0.865746 0.865739 78.7308 52 0.201943 0.201938 -14.5055 53 0.316869E-01 0.316798E-01 34.5926 54 0.523544 0.523542 -22.5383 55 0.374567 0.374573 81.4600 56 0.775625E-01 0.775620E-01 -60.5847 57 0.124301 0.124303 102.496 58 0.854228 0.854232 -36.2302 59 0.312885 0.312878 83.3492 60 0.997840 0.997833 -43.8644 61 0.643329 0.643329 158.406 62 0.325770 0.325768 -41.0037 63 0.483375 0.483396 22.2182 64 0.302575 0.302575 43.4359 65 0.562204 0.562190 70.9038 66 0.445533 0.445534 83.1813 67 0.687610 0.687611 142.282 68 0.627793 0.627789 81.5466 69 0.750461 0.750467 1.95463 70 0.283940 0.283936 22.1437 71 0.840141 0.840154 -2.38647 72 0.770468E-01 0.770622E-01 23.1955 73 0.911108 0.911119 -2.39789 74 0.440397 0.440409 40.5410 75 0.845323 0.845319 -11.9828 76 0.602852 0.602853 52.8236 77 0.550216 0.550199 -31.8672 78 0.448801 0.448782 78.1642 79 0.316434 0.316406 -23.2513 cg_rc_test(): Normal end of execution. 6 October 2025 6:02:43.527 PM