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# ab:aaa=b,aab=b a/b aaaaa=aaa b=aaa
| 1 | a | a2 | a3 | a4 | |
|---|---|---|---|---|---|
| 1 | 1 | a | a2 | a3 | a4 |
| a | a | a2 | a3 | a4 | a3 |
| a2 | a2 | a3 | a4 | a3 | a4 |
| a3 | a3 | a4 | a3 | a4 | a3 |
| a4 | a4 | a3 | a4 | a3 | a4 |
| Σ | # | Presentation | Description | Related |
|---|---|---|---|---|
| 6 | 44 | ⟨a, b | aa=b, abb=1⟩ | Isomorphic to ℤ5 | 1132 iso |
| 7 | 253 | ⟨a, b | aa=b, abb=a⟩ | Isomorphic to ℕ(5 = 1) | 71 iso |
| 7 | 254 | ⟨a, b | aa=b, abb=b⟩ | Isomorphic to ℕ(5 = 2) | 43 iso |
| 7 | 268 | ⟨a, b | ab=a, baa=b⟩ | Finite non-commutative monoid with 5 elements | 63 iso, 23 anti-iso |
| 8 | 950 | ⟨a, b | ab=a, bbbb=a⟩ | Isomorphic to ℕ(5 = 4) | 32 iso |
| 8 | 995 | ⟨a, b | ab=a, aaa=bb⟩ | Finite commutative monoid with 5 elements | 19 iso |
| 8 | 1019 | ⟨a, b | ab=a, bba=bb⟩ | Finite non-commutative monoid with 5 elements | 25 iso |
| 8 | 1020 | ⟨a, b | ab=a, bbb=aa⟩ | Finite commutative monoid with 5 elements | 9 iso |
| 8 | 1022 | ⟨a, b | ab=a, bbb=ba⟩ | Finite non-commutative monoid with 5 elements | 4 iso |
| 10 | 8617 | ⟨a, b | aa=a, abbbba=b⟩ | Finite commutative monoid with 5 elements | 3 iso |
| 11 | 15426 | ⟨a, b | aaa=aa, abbba=b⟩ | Finite commutative monoid with 5 elements |
27 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 8 | 576 | ⟨a, b | aaa=b, aba=b⟩ | φ(a) = a, φ(b) = aaa |
| 8 | 983 | ⟨a, b | aa=b, abb=ab⟩ | φ(a) = a, φ(b) = aa |
| 8 | 984 | ⟨a, b | aa=b, abb=ba⟩ | φ(a) = a, φ(b) = aa |
| 8 | 987 | ⟨a, b | aa=b, bab=ab⟩ | φ(a) = a, φ(b) = aa |
| 9 | 1587 | ⟨a, b | aaa=ab, aab=b⟩ | φ(a) = a, φ(b) = aaaa |
| 9 | 1589 | ⟨a, b | aaa=ab, aba=b⟩ | φ(a) = a, φ(b) = aaaa |
| 9 | 3040 | ⟨a, b | aa=b, aaab=ab⟩ | φ(a) = a, φ(b) = aa |
| 9 | 3041 | ⟨a, b | aa=b, aaab=ba⟩ | φ(a) = a, φ(b) = aa |
| 9 | 3044 | ⟨a, b | aa=b, aaba=ab⟩ | φ(a) = a, φ(b) = aa |
| 9 | 3045 | ⟨a, b | aa=b, aaba=ba⟩ | φ(a) = a, φ(b) = aa |
| 9 | 3157 | ⟨a, b | aa=b, abb=aaa⟩ | φ(a) = a, φ(b) = aa |
| 9 | 3162 | ⟨a, b | aa=b, bab=aaa⟩ | φ(a) = a, φ(b) = aa |
| 10 | 4121 | ⟨a, b | aab=aaa, aba=b⟩ | φ(a) = a, φ(b) = aaa |
| 10 | 4123 | ⟨a, b | aab=aaa, abb=b⟩ | φ(a) = a, φ(b) = aaa |
| 10 | 5043 | ⟨a, b | aaa=ab, aaaa=b⟩ | φ(a) = a, φ(b) = aaaa |
| 10 | 6279 | ⟨a, b | aaa=b, aaaaa=b⟩ | φ(a) = a, φ(b) = aaa |
| 10 | 6803 | ⟨a, b | aaa=b, aab=aaa⟩ | φ(a) = a, φ(b) = aaa |
| 10 | 6804 | ⟨a, b | aaa=b, aba=aaa⟩ | φ(a) = a, φ(b) = aaa |
| 10 | 6842 | ⟨a, b | abb=a, bbb=abb⟩ | φ(a) = aaa, φ(b) = a |
| 10 | 6844 | ⟨a, b | bab=a, bbb=bab⟩ | φ(a) = aaa, φ(b) = a |
| 10 | 8913 | ⟨a, b | aa=b, aaaaa=ab⟩ | φ(a) = a, φ(b) = aa |
| 10 | 9190 | ⟨a, b | aa=b, aaab=aaa⟩ | φ(a) = a, φ(b) = aa |
| 10 | 9198 | ⟨a, b | aa=b, aaba=aaa⟩ | φ(a) = a, φ(b) = aa |
| 11 | 20056 | ⟨a, b | aab=b, aaab=aaa⟩ | φ(a) = a, φ(b) = aaaa |
| 11 | 20254 | ⟨a, b | aba=b, aaab=aaa⟩ | φ(a) = a, φ(b) = aaaa |
| 11 | 20262 | ⟨a, b | aba=b, aaba=aaa⟩ | φ(a) = a, φ(b) = aaaa |
| 11 | 25260 | ⟨a, b | aa=b, aaaaa=aaa⟩ | φ(a) = a, φ(b) = aa |