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# ab:aa=1,abbbbb=b b/a bbbbbbbbb=b ab=bbbbb aa=1
| 1 | a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a |
| a | a | 1 | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a |
| b | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba |
| ba | ba | b | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a |
| b2 | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a |
| b2a | b2a | b2 | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a |
| b3 | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a |
| b3a | b3a | b3 | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a |
| b4 | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a |
| b4a | b4a | b4 | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a |
| b5 | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a |
| b5a | b5a | b5 | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba |
| b6 | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a |
| b6a | b6a | b6 | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a |
| b7 | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a |
| b7a | b7a | b7 | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a |
| b8 | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a |
| b8a | b8a | b8 | b5 | b5a | b6 | b6a | b7 | b7a | b8 | b8a | b | ba | b2 | b2a | b3 | b3a | b4 | b4a |
| Σ | # | Presentation | Description | Related |
|---|---|---|---|---|
| 8 | 1121 | ⟨a, b | aa=1, abbba=b⟩ | Finite non-commutative monoid with 18 elements | 17 iso |
| 10 | 5521 | ⟨a, b | aaab=1, bbbbbb=1⟩ | Isomorphic to ℤ18 | 33 iso |
| 10 | 6732 | ⟨a, b | aba=a, aaab=bb⟩ | Finite non-commutative monoid with 18 elements | |
| 10 | 6788 | ⟨a, b | aba=b, baab=aa⟩ | Finite non-commutative monoid with 18 elements | |
| 10 | 6795 | ⟨a, b | aba=b, bbbb=aa⟩ | Finite non-commutative monoid with 18 elements | |
| 10 | 7039 | ⟨a, b | bb=aa, aaaba=b⟩ | Finite non-commutative monoid with 18 elements | 2 iso |
| 10 | 8910 | ⟨a, b | aa=a, bbbbb=ab⟩ | Finite non-commutative monoid with 18 elements | 1 iso |
| 11 | 12187 | ⟨a, b | aaaa=ab, babb=b⟩ | Finite non-commutative monoid with 18 elements | 2 iso |
| 11 | 15797 | ⟨a, b | aab=bb, bbbba=a⟩ | Finite non-commutative monoid with 18 elements | |
| 11 | 16042 | ⟨a, b | aaa=ab, bbbb=ab⟩ | Finite non-commutative monoid with 18 elements | |
| 11 | 16043 | ⟨a, b | aaa=ab, bbbb=ba⟩ | Finite non-commutative monoid with 18 elements | |
| 11 | 16313 | ⟨a, b | aab=bb, baba=aa⟩ | Finite non-commutative monoid with 18 elements | |
| 11 | 18758 | ⟨a, b | aaa=a, bbbbbb=a⟩ | Isomorphic to ℕ(18 = 6) | |
| 11 | 18830 | ⟨a, b | aaa=b, bbbbbb=a⟩ | Isomorphic to ℕ(18 = 1) | |
| 11 | 18831 | ⟨a, b | aaa=b, bbbbbb=b⟩ | Isomorphic to ℕ(18 = 3) | |
| 11 | 19624 | ⟨a, b | aab=b, bbbba=aa⟩ | Finite non-commutative monoid with 18 elements | |
| 11 | 20914 | ⟨a, b | bb=aa, ababa=aa⟩ | Finite non-commutative monoid with 18 elements | 1 iso |
22 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 9 | 3542 | ⟨a, b | aa=1, bbbbb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 26501 | ⟨a, b | aa=1, aaabbbbb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26579 | ⟨a, b | aa=1, abaabbbb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26589 | ⟨a, b | aa=1, abababbb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26595 | ⟨a, b | aa=1, ababbabb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26597 | ⟨a, b | aa=1, ababbbab=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26611 | ⟨a, b | aa=1, abbaabbb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26615 | ⟨a, b | aa=1, abbababb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26617 | ⟨a, b | aa=1, abbabbab=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26625 | ⟨a, b | aa=1, abbbaabb=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26627 | ⟨a, b | aa=1, abbbabab=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26631 | ⟨a, b | aa=1, abbbbaab=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 27081 | ⟨a, b | aa=1, aabbbbb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27195 | ⟨a, b | aa=1, baabbbb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27206 | ⟨a, b | aa=1, bababbb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27210 | ⟨a, b | aa=1, babbabb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27214 | ⟨a, b | aa=1, babbbab=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27224 | ⟨a, b | aa=1, bbaabbb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27228 | ⟨a, b | aa=1, bbababb=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27689 | ⟨a, b | aa=1, abbbbb=aab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27692 | ⟨a, b | aa=1, abbbbb=baa⟩ | φ(a) = a, φ(b) = b |
| 11 | 28287 | ⟨a, b | aa=1, bbbbb=aaab⟩ | φ(a) = a, φ(b) = b |
9 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 11 | 26553 | ⟨a, b | aa=1, aabbbbba=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 27082 | ⟨a, b | aa=1, aabbbbb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27162 | ⟨a, b | aa=1, abbbbba=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27196 | ⟨a, b | aa=1, baabbbb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27207 | ⟨a, b | aa=1, bababbb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27211 | ⟨a, b | aa=1, babbabb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27225 | ⟨a, b | aa=1, bbaabbb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27690 | ⟨a, b | aa=1, abbbbb=aba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28288 | ⟨a, b | aa=1, bbbbb=aaba⟩ | φ(a) = a, φ(b) = b |