1 /// @file 2 /// Test Symmetric Schur Decomposition 3 /// \test Test Symmetric Schur Decomposition 4 #include <ceed.h> 5 6 int main(int argc, char **argv) { 7 Ceed ceed; 8 CeedScalar A[16] = {0.19996678, 0.0745459, -0.07448852, 0.0332866, 9 0.0745459, 1., 0.16666509, -0.07448852, 10 -0.07448852, 0.16666509, 1., 0.0745459, 11 0.0332866, -0.07448852, 0.0745459, 0.19996678}; 12 CeedScalar lambda[4]; 13 14 CeedInit(argv[1], &ceed); 15 16 CeedSymmetricSchurDecomposition(ceed, A, lambda, 4); 17 fprintf(stdout, "Q:\n"); 18 for (int i=0; i<4; i++) { 19 for (int j=0; j<4; j++) { 20 if (A[j+4*i] <= 1E-14 && A[j+4*i] >= -1E-14) A[j+4*i] = 0; 21 fprintf(stdout, "%12.8f\t", A[j+4*i]); 22 } 23 fprintf(stdout, "\n"); 24 } 25 fprintf(stdout, "lambda:\n"); 26 for (int i=0; i<4; i++) { 27 if (lambda[i] <= 1E-14 && lambda[i] >= -1E-14) lambda[i] = 0; 28 fprintf(stdout, "%12.8f\n", lambda[i]); 29 } 30 CeedDestroy(&ceed); 31 return 0; 32 } 33