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# ab:aaa=bb,aaba=b ab ba=ab aaa=bb bbb=b
| 1 | a | b | a2 | ab | b2 | a2b | ab2 | a2b2 | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | a | b | a2 | ab | b2 | a2b | ab2 | a2b2 |
| a | a | a2 | ab | b2 | a2b | ab2 | b | a2b2 | b2 |
| b | b | ab | b2 | a2b | ab2 | b | a2b2 | ab | a2b |
| a2 | a2 | b2 | a2b | ab2 | b | a2b2 | ab | b2 | ab2 |
| ab | ab | a2b | ab2 | b | a2b2 | ab | b2 | a2b | b |
| b2 | b2 | ab2 | b | a2b2 | ab | b2 | a2b | ab2 | a2b2 |
| a2b | a2b | b | a2b2 | ab | b2 | a2b | ab2 | b | ab |
| ab2 | ab2 | a2b2 | ab | b2 | a2b | ab2 | b | a2b2 | b2 |
| a2b2 | a2b2 | b2 | a2b | ab2 | b | a2b2 | ab | b2 | ab2 |
| Σ | # | Presentation | Description | Related |
|---|---|---|---|---|
| 7 | 118 | ⟨a, b | aaa=b, bbb=1⟩ | Isomorphic to ℤ9 | 562 iso |
| 8 | 568 | ⟨a, b | aaa=a, abb=b⟩ | Finite non-commutative monoid with 9 elements | 5 iso |
| 8 | 571 | ⟨a, b | aaa=a, bbb=a⟩ | Isomorphic to ℕ(9 = 3) | 48 iso |
| 8 | 581 | ⟨a, b | aaa=b, bbb=a⟩ | Isomorphic to ℕ(9 = 1) | 62 iso |
| 8 | 601 | ⟨a, b | aba=b, bab=a⟩ | Finite non-commutative monoid with 9 elements | 3 iso |
| 9 | 1584 | ⟨a, b | aaa=aa, bbb=a⟩ | Isomorphic to ℕ(9 = 6) | 16 iso |
| 9 | 1595 | ⟨a, b | aaa=ab, bab=b⟩ | Finite non-commutative monoid with 9 elements | 4 iso, 5 anti-iso |
| 9 | 1598 | ⟨a, b | aaa=ab, bbb=a⟩ | Isomorphic to ℕ(9 = 4) | 40 iso |
| 9 | 1608 | ⟨a, b | aaa=bb, bbb=a⟩ | Isomorphic to ℕ(9 = 2) | 70 iso |
| 9 | 1991 | ⟨a, b | aaa=a, abba=b⟩ | Finite non-commutative monoid with 9 elements | 3 iso |
| 9 | 2064 | ⟨a, b | aab=b, abba=a⟩ | Finite non-commutative monoid with 9 elements | 14 iso, 24 anti-iso |
| 9 | 2255 | ⟨a, b | ab=aa, bba=bb⟩ | Finite non-commutative monoid with 9 elements | |
| 10 | 4125 | ⟨a, b | aab=aaa, baa=b⟩ | Finite non-commutative monoid with 9 elements | 1 iso, 1 anti-iso |
| 10 | 4130 | ⟨a, b | aab=aaa, bbb=a⟩ | Isomorphic to ℕ(9 = 7) | 1 iso |
| 10 | 4156 | ⟨a, b | abb=aaa, bbb=a⟩ | Isomorphic to ℕ(9 = 5) | 12 iso |
| 10 | 5035 | ⟨a, b | aaa=aa, abbb=b⟩ | Finite non-commutative monoid with 9 elements | 3 iso |
| 10 | 5124 | ⟨a, b | aab=aa, bbbb=a⟩ | Isomorphic to ℕ(9 = 8) | 5 iso |
| 10 | 5339 | ⟨a, b | aaa=bb, aab=ab⟩ | Finite non-commutative monoid with 9 elements | 1 iso |
| 10 | 6824 | ⟨a, b | aab=b, bbb=aaa⟩ | Finite commutative monoid with 9 elements | 5 iso |
| 10 | 7139 | ⟨a, b | bb=aa, aaaa=ab⟩ | Finite non-commutative monoid with 9 elements | 3 iso |
| 10 | 9327 | ⟨a, b | ab=a, baaa=bbb⟩ | Finite non-commutative monoid with 9 elements | 3 iso |
| 10 | 9359 | ⟨a, b | ab=a, bbaa=bbb⟩ | Finite non-commutative monoid with 9 elements | 2 iso |
| 11 | 19506 | ⟨a, b | aab=b, aaaaa=ba⟩ | Finite non-commutative monoid with 9 elements | |
| 11 | 19507 | ⟨a, b | aab=b, aaaaa=bb⟩ | Finite commutative monoid with 9 elements | |
| 11 | 20723 | ⟨a, b | ab=aa, aaaaa=bb⟩ | Finite non-commutative monoid with 9 elements | 15 iso |
| 11 | 25656 | ⟨a, b | ab=a, bbbbb=baa⟩ | Finite non-commutative monoid with 9 elements |
8 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 11 | 12967 | ⟨a, b | abb=aaa, aaab=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 12969 | ⟨a, b | abb=aaa, aaba=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 12973 | ⟨a, b | abb=aaa, abaa=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 12979 | ⟨a, b | abb=aaa, abbb=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 13083 | ⟨a, b | bab=aaa, aaab=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 13085 | ⟨a, b | bab=aaa, aaba=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 13093 | ⟨a, b | bab=aaa, abbb=b⟩ | φ(a) = a, φ(b) = ab |
| 11 | 13097 | ⟨a, b | bab=aaa, babb=b⟩ | φ(a) = a, φ(b) = ab |