GROUP OF ORDER 64 #74
GROUP #74
Cyclic(2) x Group(32)#39
The MAGMA library number for G is 207
GrpPC : G of order 64 = 2^6
PC-Relations:
G.1^2 = G.5 * G.6,
G.4^2 = G.5,
G.2^G.1 = G.2 * G.5,
G.3^G.1 = G.3 * G.5,
G.4^G.1 = G.4 * G.6,
G.4^G.2 = G.4 * G.6,
G.4^G.3 = G.4 * G.6
The center of G is abelian of type
[ 2, 2, 2 ]
.
The orders of the terms of the lower central series are
[ 64, 4, 1 ]
.
The orders of the terms of the upper central series are
[ 1, 8, 64 ]
.
The order of the Frattini subgroup is 4.
The exponent of G is 4.
G has 2 conjugacy classes
of maximal elementary abelian p-subgroups. The orders of the maximal
elementary abelian subgroups are
[ 16, 16 ]
.
The orders of the centralizers of the maximal elementary
abelian subgroups are
[ 16, 16 ]
.
The orders of the normalizers of the maximal elementary
abelian subgroups are
[ 64, 64 ]
.
The cohomology ring of G is the quotient of a polynomial
ring in the variables
[
z,
y,
x,
w,
v,
u,
t
]
in degrees
[ 1, 1, 1, 1, 2, 3, 4 ]
, by the ideal generated by the relations
z2
+ zw
+ yw
+ xw
,
zy
+ zx
+ zw
+ yw
+ xw
+ w2
,
yw2
+ xw2
,
zwv
+ ywv
+ xwv
+ w2v
+ zu
+ wu
,
xw5
+ w6
+ w4v
+ w3u
+ zvu
+ wvu
+ y2t
+ x2t
+ w2t
+ u2
.
The Hilbert series for the cohomology ring is
1 / t6 -4t5+ 7t4 -8t3+
7t2 -4t+ 1.
Its denominator factors as
(
t-1
)4
(
t2+1
)
.
The Krull dimension of the cohomology ring is 4.
The longest regular sequence consists of the generators
y2
,
v
,
t
.
A homogeneous set of parameters is the set
y2
,
v
,
t
,
zx
+ x2
+ zw
of degrees
[ 2, 2, 4, 2 ]
.
The hypercohomolgy spectral sequence has E2
term:
ROW
(1)
: []
[]
[ zx+ yw, zw+ w2 ]
[ zw2+ w3, zxw+ xw2, yxw ]
[ zxw2+ xw3 ]
ROW
(0)
: [1]
[ x, w, z, y ]
[ xw, w2, yx, zw, yw, x2 ]
[ u, w3, zw2, xw2 ]
[ yu, xu, wu ]
[ xwu, w2u, yxu ]
[ u2 ]
Restrictions to Maximal Elementary Abelian
Subgroups
Subgroup E #1
Generated by
[ G.2 * G.3 * G.6, G.2 * G.3 * G.5 * G.6, G.1 * G.4 * G.5, G.2 * G.3 ]
The cohomology ring of E is a polynomial ring in the
variables
z
,
y
,
x
,
w
.
The images of the generators of the cohomology of G
restricted to E are
z
,
y
+ x
+ w
,
y
+ x
+ w
,
z
,
z2
+ zw
+ w2
,
z3
+ z2x
+ zx2
,
z3y
+ x4
+ z2w2
in the cohomology of E.
The kernel of the restriction to E (Minimal Prime) of the
cohomology of G is generated by
z
+ w
,
y
+ x
.
Subgroup E #2
Generated by
[ G.3 * G.6, G.2 * G.3 * G.6, G.2 * G.3 * G.5 * G.6, G.2 * G.3 ]
The cohomology ring of E is a polynomial ring in the
variables
z
,
y
,
x
,
w
.
The images of the generators of the cohomology of G
restricted to E are
0
,
y
+ x
+ w
,
z
+ y
+ x
+ w
,
0
,
zw
+ w2
,
z2x
+ zx2
,
z2x2
+ x4
in the cohomology of E.
The kernel of the restriction to E (Minimal Prime) of the
cohomology of G is generated by
z
,
w
.
The nilradical of the cohomology of G is
generated by
z
+ w
It is nilpotent of degree 3.
Restrictions to Maximal Subgroups
Maximal Subgroup H #1
Generated by
[ G.2, G.6, G.4, G.5, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.4, G.1 * G.2 * G.4 * G.5 * G.6, G.1 ]
.
The images of the generators of the cohomology of G
restricted to H are
y
+ x
,
x
,
0
,
z
+ x
,
yx
+ w
,
z3
+ zyx
+ zw
+ yw
+ v
,
z4
+ yx3
+ z2w
+ zxw
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
x
.
Maximal Subgroup H #2
Generated by
[ G.1 * G.4 * G.6, G.1 * G.2 * G.5, G.6, G.5, G.1 * G.3 * G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number11
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.3,
$.2^$.1 = $.2 * $.5
Generated by
[ G.1 * G.4 * G.6, G.1 * G.2 * G.5, G.2 * G.3 ]
of type
Cyclic(2) x Group(16)#9
.
The images of the generators of the cohomology of G
restricted to H are
z
+ y
,
z
+ x
,
x
,
y
,
y2
+ w
+ v
+ u
,
y3
+ zv
+ yu
,
y3x
+ y2w
+ w2
+ u2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ y
+ x
+ w
.
Maximal Subgroup H #3
Generated by
[ G.2 * G.4, G.3, G.6, G.5, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.2 * G.4, G.1 * G.6, G.1 * G.3 * G.5 ]
.
The images of the generators of the cohomology of G
restricted to H are
z
+ y
+ x
,
x
,
z
,
x
,
z2
+ yx
+ w
,
z3
+ zyx
+ yw
+ v
,
z4
+ yx3
+ z2w
+ y2w
+ w2
+ zv
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
y
+ w
.
Maximal Subgroup H #4
Generated by
[ G.2, G.6, G.3 * G.4 * G.6, G.5, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.3 * G.4 * G.6, G.2 * G.3 * G.4 * G.6, G.3 * G.4 * G.6 ]
.
The images of the generators of the cohomology of G
restricted to H are
x
,
z
,
z
+ y
+ x
,
z
+ y
+ x
,
z2
+ yx
+ w
,
yx2
+ zw
+ yw
+ v
,
zxw
+ zv
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
x
+ w
.
Maximal Subgroup H #5
Generated by
[ G.2, G.3, G.6, G.5, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number11
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.3,
$.2^$.1 = $.2 * $.5
Generated by
[ G.3 * G.5 * G.6, G.1 * G.2 * G.5 * G.6, G.2 * G.3 ]
of type
Cyclic(2) x Group(16)#9
.
The images of the generators of the cohomology of G
restricted to H are
z
,
z
+ x
,
y
+ x
,
0
,
w
+ v
+ u
,
zv
+ yu
,
u2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
w
.
Maximal Subgroup H #6
Generated by
[ G.3, G.6, G.4, G.5, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.3 * G.4 * G.5, G.4, G.1 ]
.
The images of the generators of the cohomology of G
restricted to H are
y
+ x
,
0
,
x
,
z
+ x
,
x2
+ w
,
z3
+ yx2
+ zw
+ yw
+ v
,
z4
+ yx3
+ z2w
+ zxw
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
y
.
Maximal Subgroup H #7
Generated by
[ G.6, G.3 * G.4 * G.6, G.5, G.2 * G.3, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number9
GrpPC of order 32 = 2^5
PC-Relations:
$.2^2 = $.5,
$.3^2 = $.5,
$.4^2 = $.5,
$.4^$.2 = $.4 * $.5,
$.4^$.3 = $.4 * $.5
Generated by
[ G.3 * G.4 * G.6, G.1 * G.5, G.1, G.2 * G.3 ]
of type
Abelian(2,2) x Quaternion(8)
.
The images of the generators of the cohomology of G
restricted to H are
y
+ x
,
z
,
z
+ w
,
w
,
yx
+ yw
+ w2
,
y3
+ y2x
+ y2w
+ yw2
+ xw2
,
y2x2
+ y3w
+ y2xw
+ yxw2
+ v
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
y
+ x
+ w
.
Maximal Subgroup H #8
Generated by
[ G.2, G.3, G.6, G.4, G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number11
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.3,
$.2^$.1 = $.2 * $.5
Generated by
[ G.2 * G.4 * G.5 * G.6, G.3 * G.5, G.2 * G.3 ]
of type
Cyclic(2) x Group(16)#9
.
The images of the generators of the cohomology of G
restricted to H are
0
,
z
+ x
,
y
+ x
,
z
,
u
,
yw
+ yv
+ zu
,
w2
+ v2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
.
Maximal Subgroup H #9
Generated by
[ G.1 * G.2 * G.5, G.3, G.6, G.4, G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.2 * G.3, G.4, G.1 * G.2 * G.4 * G.5 ]
.
The images of the generators of the cohomology of G
restricted to H are
y
+ x
,
y
+ x
,
y
,
z
+ x
,
x2
+ w
,
z3
+ yx2
+ zw
+ yw
+ v
,
z2w
+ zxw
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ y
.
Maximal Subgroup H #10
Generated by
[ G.6, G.4, G.5, G.2 * G.3, G.1 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number11
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.3,
$.2^$.1 = $.2 * $.5
Generated by
[ G.2 * G.3 * G.4 * G.6, G.1 * G.2 * G.3 * G.4 * G.5, G.2 * G.3 ]
of type
Cyclic(2) x Group(16)#9
.
The images of the generators of the cohomology of G
restricted to H are
y
,
z
+ y
+ x
,
z
+ y
+ x
,
z
+ y
,
y2
+ w
+ v
+ u
,
y3
+ yw
+ yv
+ zu
,
y4
+ y3x
+ y2u
+ w2
+ v2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
y
+ x
.
Maximal Subgroup H #11
Generated by
[ G.1 * G.4 * G.6, G.2, G.3, G.6, G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number8
GrpPC of order 32 = 2^5
PC-Relations:
$.3^$.1 = $.3 * $.5,
$.3^$.2 = $.3 * $.5,
$.4^$.3 = $.4 * $.5
Generated by
[ G.1 * G.4 * G.6, G.3 * G.5, G.2, G.3 ]
of type
Abelian(2,2) x Dihedral(8)
.
The images of the generators of the cohomology of G
restricted to H are
x
,
w
,
z
+ y
,
x
,
zy
+ zx
+ x2
+ zw
,
z2y
+ zy2
+ zyx
+ yx2
+ x3
+ z2w
+ zxw
+ x2w
+ zw2
+ zv
+ yv
+ xv
+ wv
,
z2y2
+ zyx2
+ zx3
+ yx3
+ zx2w
+ z2w2
+ x2v
+ v2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ w
.
Maximal Subgroup H #12
Generated by
[ G.1 * G.4 * G.6, G.1 * G.2 * G.5, G.3, G.6, G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.3 * G.4, G.2 * G.4, G.2 * G.3 * G.4 * G.5 ]
.
The images of the generators of the cohomology of G
restricted to H are
x
,
z
+ y
,
z
+ x
,
z
+ y
+ x
,
z2
+ x2
+ w
,
zyx
+ zw
+ yw
+ v
,
yx3
+ zxw
+ zv
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ y
+ w
.
Maximal Subgroup H #13
Generated by
[ G.2, G.6, G.4, G.5, G.1 * G.3 * G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.1 * G.3 * G.4 * G.5, G.2 * G.4, G.1 * G.3 * G.5 ]
.
The images of the generators of the cohomology of G
restricted to H are
z
+ x
,
y
,
z
+ x
,
y
+ x
,
yx
+ w
,
yx2
+ yw
+ v
,
yx3
+ z2w
+ y2w
+ w2
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ x
.
Maximal Subgroup H #14
Generated by
[ G.1 * G.2 * G.5, G.6, G.4, G.5, G.1 * G.3 * G.5 ]
.
The group H is abelian of type
[ 4, 4, 2 ]
The cohomology ring of H is a the quotient of
a polynomial ring in the variables
[
z,
y,
x,
w,
v
]
, in degrees
[ 1, 1, 1, 2, 2 ]
, by the ideal of relations
z2
,
y2
.
The images of the generators of the cohomology of G
restricted to H are
y
,
y
+ x
,
x
,
z
,
w
+ v
,
zv
+ yv
,
zyv
+ w2
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ y
+ x
.
Maximal Subgroup H #15
Generated by
[ G.1 * G.4 * G.6, G.2, G.6, G.5, G.1 * G.3 * G.5 ]
.
The Group H is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
Generated by
[ G.2 * G.3 * G.4 * G.6, G.1 * G.2 * G.3, G.1 * G.2 * G.4 * G.5 * G.6 ]
.
The images of the generators of the cohomology of G
restricted to H are
y
+ x
,
z
+ y
+ x
,
z
+ y
,
z
+ x
,
yx
+ w
,
z3
+ zyx
+ zw
+ yw
+ v
,
z4
+ yx3
+ z2w
+ zxw
+ xv
+ u
in the cohomology of H.
The kernel of the restriction to H of the
cohomology of G is generated by
z
+ x
+ w
.
The essential cohomology of G is zero.
Inflations from Maximal Quotient Groups
Maximal Quotient Group Q #1.
The kernel of the quotient is generated by
G.5
.
The Group Q is Isomorphic to the
Group of Order 32 Number10
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.5,
$.2^2 = $.5,
$.3^$.2 = $.3 * $.5,
$.4^$.2 = $.4 * $.5
of type
Cyclic(2) x AlmostExtraSpecial(16)
.
The generators of G have images
[ pcy.2 * pcy.4 * pcy.5, pcy.3 * pcy.5, pcy.4 * pcy.5, pcy.1 * pcy.4 * pcy.5 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
z
,
w
,
x
,
z
+ y
+ w
,
z4
+ z3y
+ z2v
+ zyv
+ zxv
+ v2
+ wu
+ t
in the cohomology of G.
The kernel of the inflation to G of the
cohomology of Q is generated by
zy
+ y2
+ zx
+ zw
.
Maximal Quotient Group Q #2.
The kernel of the quotient is generated by
G.6
.
The Group Q is Isomorphic to the
Group of Order 32 Number10
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.5,
$.2^2 = $.5,
$.3^$.2 = $.3 * $.5,
$.4^$.2 = $.4 * $.5
of type
Cyclic(2) x AlmostExtraSpecial(16)
.
The generators of G have images
[ pcy.1, pcy.3, pcy.4, pcy.2 * pcy.3 * pcy.4 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
w
,
z
,
z
+ x
,
z
+ y
,
z3y
+ z2v
+ wu
+ t
in the cohomology of G.
The kernel of the inflation to G of the
cohomology of Q is generated by
zy
+ y2
+ zx
+ zw
.
Maximal Quotient Group Q #3.
The kernel of the quotient is generated by
G.5 * G.6
.
The Group Q is Isomorphic to the
Group of Order 32 Number8
GrpPC of order 32 = 2^5
PC-Relations:
$.3^$.1 = $.3 * $.5,
$.3^$.2 = $.3 * $.5,
$.4^$.3 = $.4 * $.5
of type
Abelian(2,2) x Dihedral(8)
.
The generators of G have images
[ pcy.2 * pcy.3, pcy.1, pcy.4, pcy.3 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
x
,
w
,
z
+ w
,
y
,
z2
+ v
in the cohomology of G.
The kernel of the inflation to G of the
cohomology of Q is generated by
zy
+ yx
+ x2
+ yw
,
x3
.
Maximal Quotient Group Q #4.
The kernel of the quotient is generated by
G.2 * G.3 * G.5
.
The Group Q is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
.
The generators of G have images
[ pcy.1, pcy.1 * pcy.2 * pcy.5, pcy.1 * pcy.2 * pcy.4, pcy.2 * pcy.3 * pcy.4 *
pcy.5 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
y
+ x
+ w
,
z
+ y
+ x
,
z
,
zy
+ y2
+ yx
+ x2
+ v
,
z3
+ zy2
+ y2x
+ zx2
+ yx2
+ zxw
+ yxw
+ zv
+ wv
+ u
,
z4
+ y3x
+ y2x2
+ yx3
+ z2v
+ yu
+ xu
+ t
in the cohomology of G.
The kernel of the inflation is zero.
Maximal Quotient Group Q #5.
The kernel of the quotient is generated by
G.2 * G.3
.
The Group Q is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
.
The generators of G have images
[ pcy.1, pcy.1 * pcy.2 * pcy.3 * pcy.4 * pcy.5, pcy.1 * pcy.2 * pcy.3 * pcy.4 *
pcy.5, pcy.2 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
y
+ x
+ w
,
z
+ y
+ x
,
y
+ x
,
y2
+ x2
+ v
,
z3
+ zv
+ wv
+ u
,
z4
+ z3y
+ z2v
+ yu
+ xu
+ t
in the cohomology of G.
The kernel of the inflation is zero.
Maximal Quotient Group Q #6.
The kernel of the quotient is generated by
G.2 * G.3 * G.5 * G.6
.
The Group Q is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
.
The generators of G have images
[ pcy.1, pcy.1 * pcy.2 * pcy.5, pcy.1 * pcy.2, pcy.2 * pcy.3 * pcy.4 * pcy.5 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
y
+ x
+ w
,
z
+ y
+ x
,
z
,
y2
+ x2
+ v
,
z3
+ z2y
+ zy2
+ y2x
+ zx2
+ yx2
+ zxw
+ yxw
+ xw2
+ zv
+ wv
+ u
,
z4
+ y3x
+ y2x2
+ yx3
+ z2v
+ yu
+ xu
+ t
in the cohomology of G.
The kernel of the inflation is zero.
Maximal Quotient Group Q #7.
The kernel of the quotient is generated by
G.2 * G.3 * G.6
.
The Group Q is Isomorphic to the
Group of Order 32 Number39
GrpPC of order 32 = 2^5
PC-Relations:
$.1^2 = $.4 * $.5,
$.2^2 = $.5,
$.3^2 = $.5,
$.2^$.1 = $.2 * $.4,
$.3^$.2 = $.3 * $.5
.
The generators of G have images
[ pcy.1, pcy.1 * pcy.2 * pcy.3 * pcy.4 * pcy.5, pcy.1 * pcy.2 * pcy.3 * pcy.5,
pcy.2 ]
in the quotient group.
The images of the generators of the cohomology of Q
inflated to G are
y
+ x
+ w
,
z
+ y
+ x
,
y
+ x
,
zy
+ y2
+ yx
+ x2
+ v
,
z3
+ z2y
+ xw2
+ zv
+ wv
+ u
,
z4
+ z3y
+ z2v
+ yu
+ xu
+ t
in the cohomology of G.
The kernel of the inflation is zero.
The depth-essential cohomology of G
The depth-essential cohomology of G is the intersection
of the restrictions to the centralizers of the maximal elementary abelian
p-subgroups of rank d+1 where d is the depth of the
cohomology ring. For this group the depth is 3.
There are 2 conjugacy classes of subgroups which
are centralizers of elementary abelian subgroups of rank 4. They are represented
by the subgroups generated by
[ G.1 * G.2 * G.3 * G.4 * G.5 * G.6, G.1 * G.4, G.1 * G.4 * G.5, G.1 * G.4 * G.5
* G.6 ]
[ G.3 * G.5, G.3 * G.6, G.2 * G.5, G.3 ]
.
The depth-essential cohomology of G is
generated as an ideal by
z
+ w
.
The annihilator of the depth-essential cohomology has dimension
3
.
The depth-essential cohomology is a free module over
the polynomial subring Q of the cohomology ring of G generated by
y2
,
v
,
t
.
The depth-essential cohomology is generated as a module
over Q by the elements
[ z+ w ]
[ zx+ yw, zx+ xw, zw+ w2 ]
[ zw2+ w3, zxw+ xw2, yxw ]
[ zxw2+ xw3 ]
Action of Automorphisms
The groups of outer automorphisms of G has order 1024, and is generated by
10 elements.
Automorphism #1
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1
G.2
G.3
G.4 * G.5
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
y
,
x
,
w
,
z2
+ w2
+ v
,
zy2
+ zx2
+ u
,
t
.
Automorphism #2
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.6
G.2
G.3
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
y
,
x
,
w
,
z2
+ w2
+ v
,
zy2
+ zx2
+ u
,
t
.
Automorphism #3
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.5
G.2
G.3
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
y
,
x
,
w
,
z2
+ w2
+ v
,
zy2
+ zx2
+ u
,
t
.
Automorphism #4
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.6
G.2 * G.6
G.3
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
y
,
x
,
w
,
z2
+ zy
+ yx
+ w2
+ v
,
z2y
+ zy2
+ zxw
+ yxw
+ u
,
zyx2
+ zx3
+ zx2w
+ zxw2
+ t
.
Automorphism #5
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.5
G.2 * G.5
G.3
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
y
,
x
,
w
,
z2
+ zy
+ yx
+ w2
+ v
,
y2x
+ zx2
+ yx2
+ xw2
+ u
,
z3y
+ zyx2
+ y2x2
+ zx3
+ y3w
+ y2xw
+ zx2w
+ zxw2
+ t
.
Automorphism #6
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.2 * G.3
G.3
G.2
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
z
+ x
,
z
+ y
,
w
,
v
,
u
,
z4
+ t
.
Automorphism #7
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.2 * G.3
G.2
G.3
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
z
+ y
,
z
+ x
,
w
,
v
,
u
,
z4
+ t
.
Automorphism #8
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.1 * G.2 * G.3
G.2
G.3
G.2 * G.3 * G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
z
,
z
+ y
+ w
,
z
+ x
+ w
,
w
,
v
,
u
,
t
.
Automorphism #9
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.2 * G.4 * G.6
G.1 * G.4
G.1 * G.2 * G.3 * G.4
G.4
G.5
G.6
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
y
+ x
,
z
+ x
,
x
,
z
+ y
+ x
+ w
,
z2
+ y2
+ x2
+ v
,
z3
+ y3
+ y2x
+ yx2
+ x3
+ u
,
z3y
+ y3x
+ y2x2
+ yx3
+ x4
+ z2v
+ zyv
+ y2v
+ zxv
+ x2v
+ yu
+ xu
+ wu
+ t
.
Automorphism #10
The order of the class of the automorphism in the
outer automorphism group is 2.
The images of the generators of G are
G.2 * G.4
G.2
G.3
G.1 * G.2 * G.5
G.6
G.5
.
The images of the generators of the cohomology of G
under the map induced by the automorphism are
w
,
z
+ y
+ w
,
x
,
z
,
z2
+ w2
+ v
,
z3
+ yv
+ xv
+ wv
+ u
,
zwv
+ v2
+ t
.
CHECKS
paramflag =
true
qregflagflag =
true
cmflag =
false
essflag =
true
centflag =
true
THE COMPUTATION IS COMPLETE