Finite Group Databasebeta

D4021 #22548834

order8042
automorphismAut(G) order 16164420
homologyAbelianization (H1) = C2 · Schur multiplier (H2) = C1

Aliases

dihedralD4021
unambiguous semidirect productC4021⋊C2

Splittings

Fitting, socle, derived, SylowC4021 ⋊ C2

Subgroups

subgroupG/H
center, Frattini, hypercenterC1G
commutator, Fitting, socle, hypocenterC4021C2
LCSG ▷ C4021
UCSC1

4 conjugacy classes of subgroups.

Full subgroup data →

Presentation

Polycyclic presentation:

2,4021|b^a=b^4020

Conjugacy classes & character table

2012 conjugacy classes. The character table is too large to display.

Relationships

maximal subgroup of#30632675, C2×D4021, D4021⋊C3, …
maximal normal subgroup of#30632675, C2×D4021, D4021⋊C3, …
maximal quotient ofDic4021, C2×D4021, C3×D4021, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(8042, 1);