Finite Group Databasebeta
Cayley diagram

A5 #304

order60
isoclinismisoclinic class of A5
automorphismAut(G) = S5 (order 120) · Inn(G) = G · Out(G) = C2
holomorphG ⋊ Aut(G) = #72219548
homologyAbelianization (H1) = C1 · Schur multiplier (H2) = C2

Aliases

alternatingA5
projective special linearPSL(2,𝔽4)
projective special linearPSL(2,𝔽5)
special linearSL(2,𝔽4)
projective general linearPGL(2,𝔽4)
symplecticSp(2,𝔽4)
projective symplecticPSp(2,𝔽5)
projective symplecticPSp(2,𝔽4)
omegaΩ−(4,𝔽2)
omegaΩ(3,𝔽5)
special unitarySU(2,𝔽4)
projective special unitaryPSU(2,𝔽4)
projective special unitaryPSU(2,𝔽5)

Subgroups

subgroupG/H
center, Frattini, hypercenterC1G
commutator, hypocenterGC1
LCSG
UCSC1

9 conjugacy classes of subgroups.

Full subgroup data →

Presentation

minimal degreeμ(G) = 5
transitive degreeμt(G) = 5

A minimal faithful permutation representation — 2 generators on 5 points:

(1,2,3,4,5);(1,2,3)

Conjugacy classes & character table

C1C2C3C4C5
size112121520
order15523
χ111111
χ231−521+52-10
χ331+521−52-10
χ44-1-101
χ55001-1

Relationships

derived subgroup ofS5, C2×A5, C3×A5, …
socle ofS5
maximal subgroup ofS5, C2×A5, C3×A5, …
maximal normal subgroup ofS5, C2×A5, C3×A5, …
maximal quotient ofSL(2,𝔽5), C2×A5, C3×A5, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(60, 5);