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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it

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#include <typedef.h>

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#include <getput.h>

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#include <matrix.h>

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#include <base.h>

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int INFO_LEVEL;

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extern int SFLAG;

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matrix_TYP *conjugated(bravais_TYP *G,bravais_TYP *H,

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                       matrix_TYP **N,int Nanz,bahn **strong);

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main(int argc,char **argv){

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  bravais_TYP *G,

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              *H,

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              *N;

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  matrix_TYP **base,

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             *erg;

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  bahn **strong;

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  int i,

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      j,

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      l,

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      anz;

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  char comment[1000];

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  read_header(argc,argv);

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  if ((is_option('h') && optionnumber('h')==0) || (FILEANZ < 3)){

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     printf("Usage: Conjugated file1 file2 file3\n");

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     printf("\n");

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     printf("file1: bravais_TYP containing the finite group G.\n");

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     printf("file2: bravais_TYP containing the finite group H.\n");

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     printf("file2: bravais_TYP containing the group N.\n");

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     printf("\n");

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     printf("The program checks whether there is an x in N with the\n");

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     printf("property that x H x^{-1} <= G, and returns this x if it\n");

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     printf("exists.\n");

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     printf("\n");

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     printf("WARNING: The program assumes that the orbit of H under N\n");

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     printf("         is finite.\n");

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     printf("\n");

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     if (is_option('h')){

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        exit(0);

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     }

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     else{

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        exit(31);

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     }

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  }

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  INFO_LEVEL = optionnumber('h');

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  if (INFO_LEVEL & 12){

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     SFLAG = 1;

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  }

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  G = get_bravais(FILENAMES[0]);

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  H = get_bravais(FILENAMES[1]);

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  N = get_bravais(FILENAMES[2]);

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  base = get_base(G);

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  strong = strong_generators(base,G,FALSE);

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  erg = conjugated(G,H,N->gen,N->gen_no,strong);

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  /* output */

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  if (erg != NULL){

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     sprintf(comment,"conjugated the group of %s INTO the group of %s",

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                      FILENAMES[1],FILENAMES[0]);

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     put_mat(erg,NULL,comment,2);

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     free_mat(erg);

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  }

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  else{

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     printf("the groups are not conjugated under the group of %s\n",

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             FILENAMES[2]);

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  }

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  free_bravais(G);

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  free_bravais(H);

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  free_bravais(N);

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  for (i=0;i<G->dim;i++){

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     free_mat(base[i]);

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     free_bahn(strong[i]);

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     free(strong[i]);

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  }

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  free(strong);

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  free(base);

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  if (INFO_LEVEL & 12){

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     pointer_statistics(0,0);

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  }

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  exit(0);

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} /* main */

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