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Feb 29th, 2020
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  1.  gsl_matrix *d = gsl_matrix_calloc(n,n);
  2.     for(i = 0; i < n; i++)
  3.     {
  4.         for(j = 0; j < n; j++)
  5.         {
  6.                 value = 0.0;
  7.                 gsl_matrix_set(d, i, j, 0.0);
  8.                 for(int k = 0; k < n; k++)
  9.                 {
  10.                         value += 1./(i+k+2.) * gsl_matrix_get(c, k, j);
  11.                 }
  12.                 gsl_matrix_set(d, i, j, value);
  13.         }
  14.     }
  15.     fp = fopen("d.dat", "w");
  16.     for(i = 0; i < n; i++)
  17.     {
  18.         for(j = 0; j < n; j++) fprintf(fp, "%12.4g", gsl_matrix_get(d, i, j));
  19.         fprintf(fp, "\n");
  20.     }
  21.     fclose(fp);
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