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

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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _POLYEDER_H_
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#define _POLYEDER_H_
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#ifndef _CARAT_TYPEDEF_H_
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#include"typedef.h"
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#endif
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#ifdef __STDC__
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/*-------------------------------------------------------------*\
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| FILE: first_polyeder.c 
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\*-------------------------------------------------------------*/
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extern polyeder_TYP *first_polyeder(wall_TYP **mauern, int anz);
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/*-------------------------------------------------------------*\
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| FILE: polyeder_tools.c 
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\*-------------------------------------------------------------*/
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extern vertex_TYP *init_vertex(int dim, int wall_no) ;
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extern word_TYP *init_word(int dim);
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extern wall_TYP *init_wall(int dim);
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extern polyeder_TYP *init_polyeder(int vert_no, int wall_no);
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extern polyeder_TYP *get_polyeder(char *file_name);
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extern void put_polyeder(polyeder_TYP *F);
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extern int wall_times_vertex(wall_TYP *w, vertex_TYP *v);
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extern void free_vertex(vertex_TYP **v);
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extern void free_word(word_TYP *word);
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extern void free_wall(wall_TYP **v);
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extern wall_TYP *mat_to_wall(matrix_TYP *M);
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extern void normal_wall(wall_TYP *v);
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extern void normal_vertex(vertex_TYP *v);
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extern int is_vertex_of_wallno(vertex_TYP *v, int w);
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extern word_TYP *copy_word(word_TYP *w);
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extern wall_TYP *copy_wall(wall_TYP *w);
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extern void free_polyeder(polyeder_TYP *P);
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/*-------------------------------------------------------------*\
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| FILE: polyeder_to_vecs.c 
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\*-------------------------------------------------------------*/
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extern matrix_TYP **polyeder_to_vecs(polyeder_TYP *P);
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/*-------------------------------------------------------------*\
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| FILE: refine_polyeder.c 
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\*-------------------------------------------------------------*/
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extern int refine_polyeder(polyeder_TYP *F, wall_TYP *h);
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#else
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/*-------------------------------------------------------------*\
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| FILE: first_polyeder.c 
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\*-------------------------------------------------------------*/
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extern polyeder_TYP *first_polyeder();
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/*-------------------------------------------------------------*\
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| FILE: polyeder_tools.c 
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\*-------------------------------------------------------------*/
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extern vertex_TYP *init_vertex();
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extern wall_TYP *init_wall();
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extern polyeder_TYP *init_polyeder();
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extern polyeder_TYP *get_polyeder();
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extern void put_polyeder();
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extern int wall_times_vertex();
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extern void free_vertex();
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extern void free_word();
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extern void free_wall();
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extern wall_TYP *mat_to_wall();
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extern void normal_wall();
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extern void normal_vertex();
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extern int is_vertex_of_wallno();
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extern wall_TYP *copy_wall();
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extern void free_polyeder();
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/*-------------------------------------------------------------*\
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| FILE: polyeder_to_vecs.c 
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\*-------------------------------------------------------------*/
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extern matrix_TYP **polyeder_to_vecs();
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/*-------------------------------------------------------------*\
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| FILE: refine_polyeder.c 
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\*-------------------------------------------------------------*/
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extern int refine_polyeder();
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#endif
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#endif
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#ifdef __cplusplus
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}
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#endif
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