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# Test file by Wilf A. Wilson
#
gap> START_TEST("smlinfo.tst");
# SMALL_GROUPS_INFORMATION
gap> Length(SMALL_GROUPS_INFORMATION) >=
26;
true
gap> Number(SMALL_GROUPS_INFORMATION) >=
21;
true
gap> ForAll(SMALL_GROUPS_INFORMATION, IsFunction);
true
gap> Filtered([
1 ..
26],
> i -> not IsBound(SMALL_GROUPS_INFORMATION[i]));
[
13,
15,
16,
22,
23 ]
# SmallGroupsInformation, errors
gap> SmallGroupsInformation();
Error, Function: number of arguments must be
1 (not
0)
gap> SmallGroupsInformation(-
1);
Error, usage: SmallGroupsInformation( size )
gap> SmallGroupsInformation(
0);
Error, usage: SmallGroupsInformation( size )
# SmallGroupsInformation, not available
gap> SmallGroupsInformation(
1024);
The groups of size
1024 are not available.
gap> SmallGroupsInformation(
4000);
The groups of size
4000 are not available.
# SmallGroupsInformation, examples with func =
1
gap> SmallGroupsInformation(
1);
There is
1 group of order
1.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
16);
There are
14 groups of order
16.
They are sorted by their ranks.
1 is cyclic.
2 -
9 have rank
2.
10 -
13 have rank
3.
14 is elementary abelian.
For the selection functions the values of the following attributes
are precomputed and stored:
IsAbelian, PClassPGroup, RankPGroup, FrattinifactorSize and
FrattinifactorId.
This size belongs to layer
2 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
4);
There are
2 groups of order
4.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
6);
There are
2 groups of order
6.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
4
gap> SmallGroupsInformation(
8);
There are
5 groups of order
8.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
5
gap> SmallGroupsInformation(
12);
There are
5 groups of order
12.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
6
gap> SmallGroupsInformation(
18);
There are
5 groups of order
18.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
7
gap> SmallGroupsInformation(
30);
There are
4 groups of order
30.
The groups whose order factorises in at most
3 primes
have been classified by O. Hoelder. This classification is
used in the SmallGroups library.
This size belongs to layer
1 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
8
gap> SmallGroupsInformation(
64);
There are
267 groups of order
64.
They are sorted by their ranks.
1 is cyclic.
2 -
54 have rank
2.
55 -
191 have rank
3.
192 -
259 have rank
4.
260 -
266 have rank
5.
267 is elementary abelian.
For the selection functions the values of the following attributes
are precomputed and stored:
IsAbelian, PClassPGroup, RankPGroup, FrattinifactorSize and
FrattinifactorId.
This size belongs to layer
2 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
96);
There are
231 groups of order
96.
They are sorted by their Frattini factors.
1 has Frattini factor [
6,
1 ].
2 has Frattini factor [
6,
2 ].
3 has Frattini factor [
12,
3 ].
4 -
44 have Frattini factor [
12,
4 ].
45 -
63 have Frattini factor [
12,
5 ].
64 -
67 have Frattini factor [
24,
12 ].
68 -
74 have Frattini factor [
24,
13 ].
75 -
160 have Frattini factor [
24,
14 ].
161 -
184 have Frattini factor [
24,
15 ].
185 -
195 have Frattini factor [
48,
48 ].
196 -
202 have Frattini factor [
48,
49 ].
203 -
204 have Frattini factor [
48,
50 ].
205 -
219 have Frattini factor [
48,
51 ].
220 -
225 have Frattini factor [
48,
52 ].
226 -
231 have trivial Frattini subgroup.
For the selection functions the values of the following attributes
are precomputed and stored:
IsAbelian, IsNilpotentGroup, IsSupersolvableGroup, IsSolvableGroup,
LGLength, FrattinifactorSize and FrattinifactorId.
This size belongs to layer
2 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
10
gap> SmallGroupsInformation(
256);
There are
56092 groups of order
256.
They are sorted by their ranks.
1 is cyclic.
2 -
541 have rank
2.
542 -
6731 have rank
3.
6732 -
26972 have rank
4.
26973 -
55625 have rank
5.
55626 -
56081 have rank
6.
56082 -
56091 have rank
7.
56092 is elementary abelian.
For the selection functions the values of the following attributes
are precomputed and stored:
IsAbelian, PClassPGroup, RankPGroup, FrattinifactorSize and
FrattinifactorId.
This size belongs to layer
2 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
11
gap> SmallGroupsInformation(
768);
There are
1090235 groups of order
768.
They are sorted by normal Sylow subgroups.
1 -
56092 are the nilpotent groups.
56093 -
1083472 have a normal Sylow
3-subgroup
with centralizer of index
2.
1083473 -
1085323 have a normal Sylow
2-subgroup.
1085324 -
1090235 have no normal Sylow subgroup.
This size belongs to layer
3 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
12
gap> SmallGroupsInformation(
1152);
There are
157877 groups of order
1152.
They are sorted using Sylow subgroups.
1 -
2328 are nilpotent with Sylow
3-subgroup c9.
2329 -
4656 are nilpotent with Sylow
3-subgroup
3^
2.
4657 -
153312 are non-nilpotent with normal Sylow
3-subgroup.
153313 -
157877 have no normal Sylow
3-subgroup.
This size belongs to layer
6 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
1920);
There are
241004 groups of order
1920.
They are sorted using Hall subgroups.
1 -
2328 are the nilpotent groups.
2329 -
236344 have a normal Hall (
3,
5)-subgroup.
236345 -
240416 are solvable without normal Hall (
3,
5)-subgroup.
240417 -
241004 are not solvable.
This size belongs to layer
6 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
14
gap> SmallGroupsInformation(
1536);
There are
408641062 groups of order
1536.
1 -
10494213 are the nilpotent groups.
10494214 -
408526597 have a normal Sylow
3-subgroup.
408526598 -
408544625 have a normal Sylow
2-subgroup.
408544626 -
408641062 have no normal Sylow subgroup.
This size belongs to layer
8 of the SmallGroups library.
IdSmallGroup is not available for this size.
# SmallGroupsInformation, examples with func =
17
gap> SmallGroupsInformation(
1029);
There are
19 groups of order
1029.
They are sorted by normal Sylow subgroups.
1 -
5 are the nilpotent groups.
6 -
19 have a normal Sylow
7-subgroup.
This size belongs to layer
4 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
18
gap> SmallGroupsInformation(
512);
There are
10494213 groups of order
512.
1 is cyclic.
2 -
10 have rank
2 and p-class
3.
11 -
386 have rank
2 and p-class
4.
387 -
444 have rank
2 and p-class
5.
445 -
858 have rank
2 and p-class
4.
859 -
1698 have rank
2 and p-class
5.
1699 -
2008 have rank
2 and p-class
6.
2009 -
2039 have rank
2 and p-class
7.
2040 -
2044 have rank
2 and p-class
8.
2045 has rank
3 and p-class
2.
2046 -
29398 have rank
3 and p-class
3.
29399 -
30617 have rank
3 and p-class
4.
30618 -
31239 have rank
3 and p-class
3.
31240 -
56685 have rank
3 and p-class
4.
56686 -
60615 have rank
3 and p-class
5.
60616 -
60894 have rank
3 and p-class
6.
60895 -
60903 have rank
3 and p-class
7.
60904 -
67612 have rank
4 and p-class
2.
67613 -
387088 have rank
4 and p-class
3.
387089 -
419734 have rank
4 and p-class
4.
419735 -
420500 have rank
4 and p-class
5.
420501 -
420514 have rank
4 and p-class
6.
420515 -
6249623 have rank
5 and p-class
2.
6249624 -
7529606 have rank
5 and p-class
3.
7529607 -
7532374 have rank
5 and p-class
4.
7532375 -
7532392 have rank
5 and p-class
5.
7532393 -
10481221 have rank
6 and p-class
2.
10481222 -
10493038 have rank
6 and p-class
3.
10493039 -
10493061 have rank
6 and p-class
4.
10493062 -
10494173 have rank
7 and p-class
2.
10494174 -
10494200 have rank
7 and p-class
3.
10494201 -
10494212 have rank
8 and p-class
2.
10494213 is elementary abelian.
This size belongs to layer
7 of the SmallGroups library.
IdSmallGroup is not available for this size.
gap> SmallGroupsInformation(
14641);
There are
15 groups of order
14641.
They are sorted by their ranks.
1 is cyclic.
2 -
10 have rank
2.
11 -
14 have rank
3.
15 is elementary abelian.
This size belongs to layer
9 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
20
gap> SmallGroupsInformation(
16807);
There are
83 groups of order
16807.
They are sorted by their ranks.
1 is cyclic.
2 -
42 have rank
2.
43 -
76 have rank
3.
77 -
82 have rank
4.
83 is elementary abelian.
This size belongs to layer
9 of the SmallGroups library.
IdSmallGroup is not available for this size.
# SmallGroupsInformation, examples with func =
21
gap> SmallGroupsInformation(
15625);
There are
684 groups of order
15625.
Easterfield (
1940) constructed a list of the groups of
order p^
6 for p >=
5.
The database of parametrised presentations for the groups
with order p^
6 for p >=
5 is based on the Easterfield
list, corrected by Newman, O'Brien and Vaughan-Lee (
2004).
It differs only in the addition of groups in isoclinism
family $\Phi_{
13}$, in using the James (
1980) presentations
for the groups in $\Phi_{
19}$, and a small number of
typographical amendments. The linear ordering employed is
very close to that of Easterfield.
Each group with order $p^
6$ is described by a power-
commutator presentation on
6 generators and
21 relations:
15 are commutator relations and
6 are power relations.
Each presentation has the prime $p$ as a parameter.
The database contains about
500 parametrised
presentations, most of these have $p$ as the only
parameter.
This size belongs to layer
9 of the SmallGroups library.
IdSmallGroup is not available for this size.
# SmallGroupsInformation, examples with func =
24
gap> SmallGroupsInformation(
2002);
There are
8 groups of order
2002.
The groups of squarefree order have a cyclic socle and a cyclic socle factor\
.
1 is abelian
2 -
8 have socle C_1001 and factor C_2
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2010);
There are
12 groups of order
2010.
The groups of squarefree order have a cyclic socle and a cyclic socle factor\
.
1 is abelian
2 has socle C_670 and factor C_3
3 -
9 have socle C_1005 and factor C_2
10 -
12 have socle C_335 and factor C_6
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
25
gap> SmallGroupsInformation(
2004);
There are
10 groups of order
2004.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
4 are solvable with Frattini factor of size
1002
5 -
10 are solvable and Frattini free
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2028);
There are
88 groups of order
2028.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
6 are solvable with Frattini factor of size
78
7 -
18 are solvable with Frattini factor of size
156
19 -
35 are solvable with Frattini factor of size
1014
36 -
88 are solvable and Frattini free
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2100);
There are
165 groups of order
2100.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
12 are solvable with Frattini factor of size
210
13 -
40 are solvable with Frattini factor of size
420
41 -
68 are solvable with Frattini factor of size
1050
69 -
164 are solvable and Frattini free
165 is PSL(
2,
5 ) x F, F solvable and Frattini free of order
35
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2115);
There are
2 groups of order
2115.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 is solvable with Frattini factor of size
705
2 is solvable and Frattini free
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2340);
There are
167 groups of order
2340.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
12 are solvable with Frattini factor of size
390
13 -
52 are solvable with Frattini factor of size
780
53 -
72 are solvable with Frattini factor of size
1170
73 -
165 are solvable and Frattini free
166 -
167 are PSL(
2,
5 ) x F_i, F_i solvable Frattini free of order
39
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
2940);
There are
187 groups of order
2940.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
12 are solvable with Frattini factor of size
210
13 -
40 are solvable with Frattini factor of size
420
41 -
74 are solvable with Frattini factor of size
1470
75 -
185 are solvable and Frattini free
186 is PSL(
2,
5 ) x G, G solvable of order
49 with a Frattini factor
of order
7
187 is PSL(
2,
5 ) x F, F solvable and Frattini free of order
49
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
3420);
There are
144 groups of order
3420.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
12 are solvable with Frattini factor of size
570
13 -
40 are solvable with Frattini factor of size
1140
41 -
64 are solvable with Frattini factor of size
1710
65 -
141 are solvable and Frattini free
142 -
143 are PSL(
2,
5 ) x F_i, F_i solvable Frattini free of order
57
144 is PSL(
2,
19 )
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
gap> SmallGroupsInformation(
8820);
There are
672 groups of order
8820.
The groups of cubefree order are either solvable or a direct product of
the form PSL(
2, p ) x solvable group. The cubefree solvable groups are
determined by their Frattini factor.
1 -
12 are solvable with Frattini factor of size
210
13 -
40 are solvable with Frattini factor of size
420
41 -
60 are solvable with Frattini factor of size
630
61 -
129 are solvable with Frattini factor of size
1260
130 -
163 are solvable with Frattini factor of size
1470
164 -
274 are solvable with Frattini factor of size
2940
275 -
344 are solvable with Frattini factor of size
4410
345 -
666 are solvable and Frattini free
667 -
668 are PSL(
2,
5 ) x G_i, G_i solvable of order
147 with a
Frattini factor of order
21
669 -
672 are PSL(
2,
5 ) x F_i, F_i solvable Frattini free of order
147
This size belongs to layer
10 of the SmallGroups library.
IdSmallGroup is available for this size.
# SmallGroupsInformation, examples with func =
26
gap> SmallGroupsInformation(
2187);
There are
9310 groups of order
2187.
E.A. O'Brien and M.R. Vaughan-Lee determined presentations
of the groups with order p^
7. A preprint of their paper is
available at
http://www.math.auckland.ac.nz/%7Eobrien/research/p7/paper-p7.pdf
For p in {
3,
5,
7,
11 } explicit lists of groups of order
p^
7 have been produced and stored into the database.
Giving the power commutator presentations of any of these
groups using a standard notation they might be reduced to
35
elements of the group or a
245 p-digit number.
Only
56 of these digits may be unlike
0 for any group and
even these
56 digits are mostly like
0. Further on these
digits are often quite likely for sequences of subsequent
groups. Thus storage of groups was done by finding a so
called head group and a so called tail. Along the tail
only the different digits compared to the head are relevant.
Even the tails occur more or less often and this is used
to improve storage too. Since p^
7 is too big the data is
stored into some remaining holes of SMALL_GROUP_LIB at
Primes[ p +
10 ].
This size belongs to layer
11 of the SmallGroups library.
IdSmallGroup is not available for this size.
#
gap> STOP_TEST("smlinfo.tst");