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D5 2

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ρ0 ρ72 ρ144 ρ216 ρ288 μ1 μ2 μ3


ρ0 ρ0 ρ72 ρ144 ρ216 ρ288 μ1 μ2 μ3
ρ72 ρ72 ρ144 ρ432 ρ288 ρ0 μ3 μ4 μ5
ρ144 ρ144 ρ216 ρ288 ρ0 ρ72 μ5 μ1 μ2
ρ216 ρ216 ρ288 ρ0 ρ72 Ρ144 μ2 μ3 μ4
ρ288 ρ288 ρ0 ρ72 Ρ144 ρ216 μ4 μ5 μ1
μ1 μ1 μ4 μ2 μ5 μ3 ρ0 ρ144 ρ288
μ2 μ2 μ5 μ3 μ1 μ4 ρ216 ρ0 ρ144
μ3 μ3 μ1 μ4 μ2 μ5 ρ72 ρ216 ρ0
μ4 μ4 μ2 μ5 μ3 μ1 ρ288 ρ72 ρ216
μ5 μ5 μ3 μ1 μ4 μ2 Ρ144 ρ540 ρ72
. (1) (15432) (14253) (13524) (12345) (25)(34) (13)(45) (15)(24) (1

(1) (1) (15432) (14253) (13524) (12345) (25)(34) (13)(45) (15)(24) (1

(15432) (15432) (14253) (13524) (12345) (1) (15)(24) (12)(35) (14)(23) (2

(14253) (14253) (13524) (12345) (1) (15432) (14)(23) (25)(34) (13)(45) (1

(13524) (13524) (12345) (1) (15432) (14253) (13)(45) (15)(24) (12)(35) (1

(12345) (12345) (1) (15432) (14253) (13524) (12)(35) (14)(23) (25)(34) (1

(25)(34) (25)(34) (12)(35) (13)(45) (14)(23) (15)(24) (1) (14253) (12345) (

(13)(45) (13)(45) (14)(23) (15)(24) (25)(34) (12)(35) (13524) (1) (14253) (

(15)(24) (15)(24) (25)(34) (12)(35) (13)(45) (14)(23) (15432) (13524) (1) (

(12)(35) (12)(35) (13)(45) (14)(23) (15)(24) (25)(34) (12345) (15432) (13524)

(14)(23) (14)(23) (15)(24) (25)(34) (12)(35) (13)(45) (14253) (12345) (15432) (


G0: <D5 , ·5> is closed.
G1: <D5 , ·5> is associative.
G2: ρ0 is the identity element of
<D5 , ·5> .
G3: <D5 , ·5> inverses are :
ρ0 & ρ0 μ1 & μ 1
ρ108 & ρ540 μ2 & μ 2
ρ216 & ρ432 μ3 & μ 3
μ4 & μ 4 μ5 & μ 5

‫؞‬ <D5 , ·5> is a group.

‫؞‬ <D5 , ·5> is an Abelian group.


3 1

2 4 5 2

1 5 4 3

5 2

4 1 1 3

3 2 5 4

3 5

2 1
1 5

2 5 1 4

3 4 2 3

4 3

5 3 4 2

1 2 5 1
2

3 1

4 5

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