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# ab:aa=1,abba=b b/a bbbb=b ba=abb aa=1
| 1 | a | b | ab | b2 | ab2 | b3 | ab3 | |
|---|---|---|---|---|---|---|---|---|
| 1 | 1 | a | b | ab | b2 | ab2 | b3 | ab3 |
| a | a | 1 | ab | b | ab2 | b2 | ab3 | b3 |
| b | b | ab2 | b2 | ab3 | b3 | ab | b | ab2 |
| ab | ab | b2 | ab2 | b3 | ab3 | b | ab | b2 |
| b2 | b2 | ab | b3 | ab2 | b | ab3 | b2 | ab |
| ab2 | ab2 | b | ab3 | b2 | ab | b3 | ab2 | b |
| b3 | b3 | ab3 | b | ab | b2 | ab2 | b3 | ab3 |
| ab3 | ab3 | b3 | ab | b | ab2 | b2 | ab3 | b3 |
| Σ | # | Presentation | Description | Related |
|---|---|---|---|---|
| 7 | 188 | ⟨a, b | aab=1, bbbb=1⟩ | Isomorphic to ℤ8 | 727 iso |
| 8 | 556 | ⟨a, b | aba=b, aabb=1⟩ | Finite non-Abelian group with 8 elements | 28 iso |
| 8 | 898 | ⟨a, b | aa=a, bbbb=a⟩ | Isomorphic to ℕ(8 = 4) | 48 iso |
| 8 | 918 | ⟨a, b | aa=b, bbbb=a⟩ | Isomorphic to ℕ(8 = 1) | 34 iso |
| 8 | 919 | ⟨a, b | aa=b, bbbb=b⟩ | Isomorphic to ℕ(8 = 2) | 46 iso |
| 8 | 961 | ⟨a, b | aa=a, aba=bb⟩ | Finite non-commutative monoid with 8 elements | 5 iso |
| 9 | 1605 | ⟨a, b | aaa=bb, abb=b⟩ | Isomorphic to ℕ(8 = 3) | 55 iso |
| 9 | 1606 | ⟨a, b | aaa=bb, bab=a⟩ | Finite commutative monoid with 8 elements | 14 iso |
| 9 | 1615 | ⟨a, b | aab=aa, baa=b⟩ | Finite non-commutative monoid with 8 elements | 9 iso, 5 anti-iso |
| 9 | 1650 | ⟨a, b | aab=bb, baa=a⟩ | Finite non-commutative monoid with 8 elements | 4 iso, 11 anti-iso |
| 9 | 2206 | ⟨a, b | ab=aa, bbbb=a⟩ | Isomorphic to ℕ(8 = 5) | 32 iso |
| 9 | 2220 | ⟨a, b | bb=aa, aaab=a⟩ | Finite commutative monoid with 8 elements | 22 iso |
| 9 | 2247 | ⟨a, b | ab=aa, baa=bb⟩ | Finite non-commutative monoid with 8 elements | 1 iso |
| 9 | 2256 | ⟨a, b | ab=aa, bbb=aa⟩ | Finite non-commutative monoid with 8 elements | 1 iso |
| 9 | 2258 | ⟨a, b | ab=aa, bbb=ba⟩ | Finite non-commutative monoid with 8 elements | |
| 9 | 2883 | ⟨a, b | aa=a, abbbb=b⟩ | Finite non-commutative monoid with 8 elements | 14 iso |
| 9 | 3107 | ⟨a, b | ab=a, baaa=bb⟩ | Finite non-commutative monoid with 8 elements | 9 iso |
| 9 | 3123 | ⟨a, b | ab=a, bbaa=bb⟩ | Finite non-commutative monoid with 8 elements | 10 iso |
| 10 | 5191 | ⟨a, b | aab=bb, aaaa=b⟩ | Isomorphic to ℕ(8 = 6) | 18 iso |
| 10 | 6664 | ⟨a, b | aab=b, aaaa=ba⟩ | Finite non-commutative monoid with 8 elements | 1 iso |
| 10 | 7057 | ⟨a, b | ab=aa, aaaa=bb⟩ | Finite non-commutative monoid with 8 elements | 7 iso |
| 10 | 9380 | ⟨a, b | ab=a, bbbb=baa⟩ | Finite non-commutative monoid with 8 elements | 2 iso |
| 11 | 12606 | ⟨a, b | abbb=aa, bbbb=a⟩ | Isomorphic to ℕ(8 = 7) | 14 iso |
| 11 | 20047 | ⟨a, b | aab=a, bbbb=bbb⟩ | Finite non-commutative monoid with 8 elements | |
| 11 | 20051 | ⟨a, b | aab=b, aaaa=abb⟩ | Finite commutative monoid with 8 elements | 1 iso |
| 11 | 24863 | ⟨a, b | ab=a, aaaaaa=bb⟩ | Finite commutative monoid with 8 elements | |
| 11 | 25112 | ⟨a, b | ab=a, bbbbbb=aa⟩ | Finite commutative monoid with 8 elements | |
| 11 | 25114 | ⟨a, b | ab=a, bbbbbb=ba⟩ | Finite non-commutative monoid with 8 elements | |
| 11 | 25411 | ⟨a, b | ab=a, aaaaa=bbb⟩ | Finite commutative monoid with 8 elements | |
| 11 | 25652 | ⟨a, b | ab=a, bbbbb=aaa⟩ | Finite commutative monoid with 8 elements | |
| 11 | 25658 | ⟨a, b | ab=a, bbbbb=bba⟩ | Finite non-commutative monoid with 8 elements | |
| 11 | 25897 | ⟨a, b | ab=a, bbbb=aaaa⟩ | Finite commutative monoid with 8 elements | |
| 11 | 25911 | ⟨a, b | ab=a, bbbb=bbba⟩ | Finite non-commutative monoid with 8 elements |
60 total
| Σ | # | Presentation | Mapping |
|---|---|---|---|
| 7 | 364 | ⟨a, b | aa=1, aba=bb⟩ | φ(a) = a, φ(b) = b |
| 7 | 367 | ⟨a, b | aa=1, abb=ba⟩ | φ(a) = a, φ(b) = b |
| 8 | 1115 | ⟨a, b | aa=1, ababa=b⟩ | φ(a) = a, φ(b) = ab |
| 8 | 1185 | ⟨a, b | aa=1, abab=ba⟩ | φ(a) = a, φ(b) = ab |
| 8 | 1250 | ⟨a, b | aa=1, bab=aba⟩ | φ(a) = a, φ(b) = ab |
| 9 | 3349 | ⟨a, b | aa=1, aaabba=b⟩ | φ(a) = a, φ(b) = b |
| 9 | 3369 | ⟨a, b | aa=1, abaaba=b⟩ | φ(a) = a, φ(b) = b |
| 9 | 3482 | ⟨a, b | aa=1, aaaba=bb⟩ | φ(a) = a, φ(b) = b |
| 9 | 3485 | ⟨a, b | aa=1, aaabb=ba⟩ | φ(a) = a, φ(b) = b |
| 9 | 3495 | ⟨a, b | aa=1, aabba=ab⟩ | φ(a) = a, φ(b) = b |
| 9 | 3504 | ⟨a, b | aa=1, abaab=ba⟩ | φ(a) = a, φ(b) = b |
| 9 | 3620 | ⟨a, b | aa=1, aaab=bba⟩ | φ(a) = a, φ(b) = b |
| 9 | 3625 | ⟨a, b | aa=1, aaba=abb⟩ | φ(a) = a, φ(b) = b |
| 9 | 3632 | ⟨a, b | aa=1, aabb=aba⟩ | φ(a) = a, φ(b) = b |
| 9 | 3647 | ⟨a, b | aa=1, abba=aab⟩ | φ(a) = a, φ(b) = b |
| 9 | 3662 | ⟨a, b | aa=1, baab=aba⟩ | φ(a) = a, φ(b) = b |
| 10 | 9677 | ⟨a, b | aa=1, aaababa=b⟩ | φ(a) = a, φ(b) = ab |
| 10 | 9719 | ⟨a, b | aa=1, abaaaba=b⟩ | φ(a) = a, φ(b) = ab |
| 10 | 9949 | ⟨a, b | aa=1, aaabab=ba⟩ | φ(a) = a, φ(b) = ab |
| 10 | 9964 | ⟨a, b | aa=1, aababa=ab⟩ | φ(a) = a, φ(b) = ab |
| 10 | 9988 | ⟨a, b | aa=1, abaaab=ba⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10219 | ⟨a, b | aa=1, aaaba=bab⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10238 | ⟨a, b | aa=1, aabab=aba⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10269 | ⟨a, b | aa=1, ababa=aab⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10306 | ⟨a, b | aa=1, baaab=aba⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10483 | ⟨a, b | aa=1, abab=aaba⟩ | φ(a) = a, φ(b) = ab |
| 10 | 10500 | ⟨a, b | aa=1, baaa=abab⟩ | φ(a) = a, φ(b) = ab |
| 11 | 26453 | ⟨a, b | aa=1, aaaaabba=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26475 | ⟨a, b | aa=1, aaabaaba=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26487 | ⟨a, b | aa=1, aaabbaaa=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26559 | ⟨a, b | aa=1, abaaaaba=b⟩ | φ(a) = a, φ(b) = b |
| 11 | 26978 | ⟨a, b | aa=1, aaaaaba=bb⟩ | φ(a) = a, φ(b) = b |
| 11 | 26981 | ⟨a, b | aa=1, aaaaabb=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 26992 | ⟨a, b | aa=1, aaaabba=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27001 | ⟨a, b | aa=1, aaabaaa=bb⟩ | φ(a) = a, φ(b) = b |
| 11 | 27004 | ⟨a, b | aa=1, aaabaab=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27016 | ⟨a, b | aa=1, aaabbaa=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27035 | ⟨a, b | aa=1, aabaaba=ab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27086 | ⟨a, b | aa=1, abaaaab=ba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27508 | ⟨a, b | aa=1, aaaaab=bba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27513 | ⟨a, b | aa=1, aaaaba=abb⟩ | φ(a) = a, φ(b) = b |
| 11 | 27520 | ⟨a, b | aa=1, aaaabb=aba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27532 | ⟨a, b | aa=1, aaabaa=bba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27543 | ⟨a, b | aa=1, aaabba=aab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27546 | ⟨a, b | aa=1, aaabba=baa⟩ | φ(a) = a, φ(b) = b |
| 11 | 27560 | ⟨a, b | aa=1, aabaab=aba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27584 | ⟨a, b | aa=1, aabbaa=aba⟩ | φ(a) = a, φ(b) = b |
| 11 | 27621 | ⟨a, b | aa=1, abaaba=aab⟩ | φ(a) = a, φ(b) = b |
| 11 | 27698 | ⟨a, b | aa=1, baaaab=aba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28040 | ⟨a, b | aa=1, aaaab=abba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28053 | ⟨a, b | aa=1, aaaba=aabb⟩ | φ(a) = a, φ(b) = b |
| 11 | 28059 | ⟨a, b | aa=1, aaaba=baab⟩ | φ(a) = a, φ(b) = b |
| 11 | 28062 | ⟨a, b | aa=1, aaaba=bbaa⟩ | φ(a) = a, φ(b) = b |
| 11 | 28068 | ⟨a, b | aa=1, aaabb=aaba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28074 | ⟨a, b | aa=1, aaabb=baaa⟩ | φ(a) = a, φ(b) = b |
| 11 | 28087 | ⟨a, b | aa=1, aabaa=abba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28109 | ⟨a, b | aa=1, aabba=aaab⟩ | φ(a) = a, φ(b) = b |
| 11 | 28112 | ⟨a, b | aa=1, aabba=abaa⟩ | φ(a) = a, φ(b) = b |
| 11 | 28142 | ⟨a, b | aa=1, abaab=aaba⟩ | φ(a) = a, φ(b) = b |
| 11 | 28148 | ⟨a, b | aa=1, abaab=baaa⟩ | φ(a) = a, φ(b) = b |