/**************************************************************************** ** *A pcp_vars.h ANUPQ source Eamonn O'Brien ** *Y Copyright 1995-2001, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany *Y Copyright 1995-2001, School of Mathematical Sciences, ANU, Australia **
*/
/* definition file for structure used in computing
power-commutator presentation and for array y */
#ifndef ANUPQ_PCP_VARS_H #define ANUPQ_PCP_VARS_H
#define MAXIDENT 100
struct pcp_vars {
int p; /* prime */ int pm1; /* prime - 1 */
int m; /* number of automorphisms */
int cc; /* current class */ int ccbeg; /* begin current class */ int clend; /* end current class */
int newgen; /* number of generators of nucleus */ int multiplicator_rank; /* rank of multiplicator */ int lastg; /* last generator of group */ int first_pseudo; /* first pseudo-generator */ int redgen; /* redundant generator */
int fronty; /* first storage position available in y */ int dgen; /* storage location for generators */ int relp; /* storage location for relations */ int lused; /* last position used in y from front */ int gspace; /* first garbage location available in y */ int words; /* storage position of words in y */ int submlg; /* position subgrp - lastg */ int subgrp; /* storage position of subgroup information */ int structure; /* storage position of structure information */ int ppower; /* base position for power information */ int ppcomm; /* base position for pointers to commutators */ int backy; /* last storage place available in y */
int extra_relations; /* indicate whether exponent law is imposed */ int start_wt; /* start weight for exponent checking */ int end_wt; /* end weight for exponent checking */
int ndgen; /* number of defining generators */ int ndrel; /* number of defining relations */ int ncomm; /* number of commutators */ int nwords; /* number of words */ int nsubgp; /* number of subgroups */
int nocset; /* number of occurrences parameter */ int complete; /* is the group complete? */ int ncset; /* is next class set up? */
char ident[MAXIDENT]; /* identifier of group */
Logical middle_of_tails; /* middle of tails calculation? */
Logical update; /* update of generators performed? */
Logical dummy1; /* dummy variables which can be used later */
Logical dummy2;
Logical dummy3;
Logical metabelian; /* is the group metabelian? */
Logical fullop; /* indicate nature of output */
Logical diagn; /* indicate nature of output */
Logical eliminate_flag; /* indicate that generator is eliminated */
Logical valid; /* indicate that input is valid */
Logical overflow; /* indicate integer or space overflow */
Logical multiplicator; /* p-multiplicator is to be computed */
Logical cover; /* p-covering group is to be computed */
};
externint *y_address; /* definition of storage for presentation */
#endif
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