#13123 ⟨a, b | aab=aaa, aba=bb⟩

Properties

Presentation has sum-of-sides 11
Finite non-commutative monoid with 15 elements

Element profile

4 element center:
- 1, a⁴, (ab)², aba³
2 idempotent elements:
- 1, a⁴
Zero element: a⁴

Complete rewriting system

Format:	Pretty Plain
Word to reduce:
	Tips: Lowercase letters stand for generators. Spaces are ignored. Numbers repeat the previous letter, e.g. `b90`.
Reduction strategy:	Leftmost Rightmost
Path to normal form:	1 1

Reduction order:
- Right-to-left recursive path with deg(a) = 0; deg(b) = 1

a⁵ ⇒ a⁴
a²b ⇒ a³
ba⁴ ⇒ a⁴
b² ⇒ aba
(ba)² ⇒ (ab)²

# ab:aab=aaa,aba=bb reversed:a/b
aaaaa=aaaa
aab=aaa
baaaa=aaaa
bb=aba
baba=abab

Cayley table

Idempotents are shown in bold.

	1	a	b	a²	ab	ba	a³	aba	ba²	bab	a⁴	aba²	(ab)²	ba³	aba³
1	1	a	b	a²	ab	ba	a³	aba	ba²	bab	a⁴	aba²	(ab)²	ba³	aba³
a	a	a²	ab	a³	a³	aba	a⁴	a⁴	aba²	(ab)²	a⁴	a⁴	a⁴	aba³	a⁴
b	b	ba	aba	ba²	bab	aba²	ba³	(ab)²	aba³	aba³	a⁴	a⁴	a⁴	a⁴	a⁴
a²	a²	a³	a³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
ab	ab	aba	a⁴	aba²	(ab)²	a⁴	aba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
ba	ba	ba²	bab	ba³	ba³	(ab)²	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
a³	a³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
aba	aba	aba²	(ab)²	aba³	aba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
ba²	ba²	ba³	ba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
bab	bab	(ab)²	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
aba²	aba²	aba³	aba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
(ab)²	(ab)²	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
ba³	ba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴
aba³	aba³	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴	a⁴

Right Cayley graph

Idempotents are shown in bold.

Left Cayley graph

Idempotents are shown in bold.

Others with same cardinality

22 unique, 190 total

Σ	#	Presentation	Description	Related
9	1602	⟨a, b \| aaa=bb, aba=a⟩	Finite non-commutative monoid with 15 elements	2 iso
9	1603	⟨a, b \| aaa=bb, aba=b⟩	Finite non-commutative monoid with 15 elements	1 iso
9	1751	⟨a, b \| aaab=1, bbbbb=1⟩	Isomorphic to ℤ₁₅	138 iso
9	1993	⟨a, b \| aaa=a, abbb=b⟩	Finite non-commutative monoid with 15 elements	4 iso
10	5342	⟨a, b \| aaa=bb, aba=aa⟩	Finite non-commutative monoid with 15 elements	1 iso
10	5344	⟨a, b \| aaa=bb, aba=bb⟩	Finite non-commutative monoid with 15 elements	2 iso
10	6276	⟨a, b \| aaa=a, bbbbb=a⟩	Isomorphic to ℕ_{(15 = 5)}
10	6316	⟨a, b \| aaa=b, bbbbb=a⟩	Isomorphic to ℕ_{(15 = 1)}
10	6317	⟨a, b \| aaa=b, bbbbb=b⟩	Isomorphic to ℕ_{(15 = 3)}
11	12981	⟨a, b \| abb=aaa, baaa=b⟩	Finite non-commutative monoid with 15 elements	3 iso
11	12985	⟨a, b \| abb=aaa, baba=b⟩	Finite non-commutative monoid with 15 elements	7 iso
11	13191	⟨a, b \| abb=aaa, bbb=ab⟩	Finite non-commutative monoid with 15 elements	1 iso
11	13192	⟨a, b \| abb=aaa, bbb=ba⟩	Finite non-commutative monoid with 15 elements
11	15439	⟨a, b \| aaa=aa, bbbbb=a⟩	Isomorphic to ℕ_{(15 = 10)}
11	15503	⟨a, b \| aaa=ab, bbbbb=a⟩	Isomorphic to ℕ_{(15 = 6)}	1 iso
11	15543	⟨a, b \| aaa=bb, bbbbb=a⟩	Isomorphic to ℕ_{(15 = 2)}	1 iso
11	16041	⟨a, b \| aaa=ab, bbbb=aa⟩	Finite non-commutative monoid with 15 elements
11	16142	⟨a, b \| aab=aa, bbbb=ab⟩	Finite non-commutative monoid with 15 elements
11	19374	⟨a, b \| aaa=b, bbbbb=ab⟩	Isomorphic to ℕ_{(15 = 4)}
11	19502	⟨a, b \| aab=a, bbbbb=ba⟩	Finite non-commutative monoid with 15 elements	1 anti-iso
11	20144	⟨a, b \| aab=b, bbaa=aaa⟩	Finite non-commutative monoid with 15 elements
11	20819	⟨a, b \| ab=aa, bbaaa=bb⟩	Finite non-commutative monoid with 15 elements	6 iso

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