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# ab:ab=a,aaaa=bbb a/b aaaaa=a ba=a ab=a bbb=aaaa
| 1 | a | b | a2 | b2 | a3 | a4 | |
|---|---|---|---|---|---|---|---|
| 1 | 1 | a | b | a2 | b2 | a3 | a4 |
| a | a | a2 | a | a3 | a | a4 | a |
| b | b | a | b2 | a2 | a4 | a3 | a4 |
| a2 | a2 | a3 | a2 | a4 | a2 | a | a2 |
| b2 | b2 | a | a4 | a2 | a4 | a3 | a4 |
| a3 | a3 | a4 | a3 | a | a3 | a2 | a3 |
| a4 | a4 | a | a4 | a2 | a4 | a3 | a4 |
| Σ | # | Presentation | Description | Related |
|---|---|---|---|---|
| 7 | 116 | ⟨a, b | aaa=b, abb=1⟩ | Isomorphic to ℤ7 | 763 iso |
| 8 | 577 | ⟨a, b | aaa=b, abb=a⟩ | Isomorphic to ℕ(7 = 1) | 59 iso |
| 8 | 578 | ⟨a, b | aaa=b, abb=b⟩ | Isomorphic to ℕ(7 = 3) | 44 iso |
| 8 | 913 | ⟨a, b | aa=b, abbb=b⟩ | Isomorphic to ℕ(7 = 2) | 82 iso |
| 8 | 937 | ⟨a, b | ab=a, baaa=b⟩ | Finite non-commutative monoid with 7 elements | 54 iso, 12 anti-iso |
| 9 | 1593 | ⟨a, b | aaa=ab, baa=b⟩ | Finite non-commutative monoid with 7 elements | 1 iso, 2 anti-iso |
| 9 | 1601 | ⟨a, b | aaa=bb, aab=b⟩ | Finite commutative monoid with 7 elements | 5 iso |
| 9 | 1620 | ⟨a, b | aab=aa, bbb=a⟩ | Isomorphic to ℕ(7 = 6) | 35 iso |
| 9 | 1632 | ⟨a, b | aab=ab, bbb=a⟩ | Isomorphic to ℕ(7 = 4) | 50 iso |
| 9 | 2074 | ⟨a, b | aab=b, babb=a⟩ | Finite commutative monoid with 7 elements | 20 iso |
| 9 | 2231 | ⟨a, b | ab=aa, aaa=bb⟩ | Finite non-commutative monoid with 7 elements | 3 iso |
| 9 | 2271 | ⟨a, b | bb=aa, aaa=ab⟩ | Finite non-commutative monoid with 7 elements | 1 iso, 2 anti-iso |
| 9 | 3197 | ⟨a, b | ab=a, bbb=baa⟩ | Finite non-commutative monoid with 7 elements | 5 iso |
| 10 | 4162 | ⟨a, b | abb=aab, bbb=a⟩ | Isomorphic to ℕ(7 = 5) | 42 iso |
| 10 | 6251 | ⟨a, b | aaa=a, aabba=b⟩ | Finite non-commutative monoid with 7 elements | 1 iso |
| 10 | 8987 | ⟨a, b | ab=a, aaaaa=bb⟩ | Finite commutative monoid with 7 elements | 5 iso |
| 10 | 9108 | ⟨a, b | ab=a, bbbbb=aa⟩ | Finite commutative monoid with 7 elements | 2 iso |
| 10 | 9110 | ⟨a, b | ab=a, bbbbb=ba⟩ | Finite non-commutative monoid with 7 elements | 1 iso |
| 10 | 9375 | ⟨a, b | ab=a, bbba=bbb⟩ | Finite non-commutative monoid with 7 elements | 3 iso |
| 10 | 9376 | ⟨a, b | ab=a, bbbb=aaa⟩ | Finite commutative monoid with 7 elements | 3 iso |
| 10 | 9382 | ⟨a, b | ab=a, bbbb=bba⟩ | Finite non-commutative monoid with 7 elements | 1 iso |
| 11 | 14843 | ⟨a, b | abba=b, aabab=a⟩ | Finite non-commutative monoid with 7 elements | 1 iso |
4 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 11 | 25419 | ⟨a, b | ab=a, aaaab=bbb⟩ | φ(a) = a, φ(b) = b |
| 11 | 25427 | ⟨a, b | ab=a, aaaba=bbb⟩ | φ(a) = a, φ(b) = b |
| 11 | 25443 | ⟨a, b | ab=a, aabaa=bbb⟩ | φ(a) = a, φ(b) = b |
| 11 | 25475 | ⟨a, b | ab=a, abaaa=bbb⟩ | φ(a) = a, φ(b) = b |