#1594 ⟨a, b | aaa=ab, bab=a⟩
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- Properties
- Staircase diagram
- Rewriting system
- Isomorphic instances
- Presentation has sum-of-sides 9
- Infinite non-cancellative commutative monoid
- Not cancellative, because multiplication by ab is not injective:
-
ab ⋅ b2 = ab and ab ⋅ 1 = ab, however b2 ≠ 1
- Commutative Gröbner basis: ⟨a, b | a3=ab, ab2=a⟩
- Cancellative quotient is isomorphic to ℤ4
- Enveloping group is isomorphic to ℤ4
- Group of units is isomorphic to ℤ1
- 3 Archimedian components:
- Reduction order:
- Left-to-right recursive path with deg(a) = 0; deg(b) = 1
- Certificate: derivations of all rewriting rules from the defining relations.
# ab:aaa=ab,bab=a a/b
aaaaa=a
ba=aaa
ab=aaa
The mapping is from the listed presentation's alphabet to the current rewriting system's alphabet.
26 total
| Σ | # | Presentation | Mapping |
| 9 | 2117 | ⟨a, b | aba=b, abbb=b⟩ | φ(a) = b, φ(b) = a |
| 9 | 2121 | ⟨a, b | aba=b, babb=b⟩ | φ(a) = b, φ(b) = a |
| 10 | 5058 | ⟨a, b | aaa=ab, baaa=a⟩ | φ(a) = a, φ(b) = b |
| 11 | 12281 | ⟨a, b | aaab=ba, abbb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 12361 | ⟨a, b | aaba=ab, abbb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 12502 | ⟨a, b | abab=aa, baaa=a⟩ | φ(a) = a, φ(b) = b |
| 11 | 12593 | ⟨a, b | abba=bb, abbb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 12601 | ⟨a, b | abba=bb, babb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19181 | ⟨a, b | aba=b, aababb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19187 | ⟨a, b | aba=b, aabbba=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19195 | ⟨a, b | aba=b, abaabb=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19197 | ⟨a, b | aba=b, ababab=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19199 | ⟨a, b | aba=b, ababba=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19217 | ⟨a, b | aba=b, baabab=b⟩ | φ(a) = b, φ(b) = a |
| 11 | 19731 | ⟨a, b | aba=b, aabbb=ab⟩ | φ(a) = b, φ(b) = a |
| 11 | 19742 | ⟨a, b | aba=b, ababb=ab⟩ | φ(a) = b, φ(b) = a |
| 11 | 19743 | ⟨a, b | aba=b, ababb=ba⟩ | φ(a) = b, φ(b) = a |
| 11 | 19746 | ⟨a, b | aba=b, abbab=ab⟩ | φ(a) = b, φ(b) = a |
| 11 | 19750 | ⟨a, b | aba=b, abbba=ab⟩ | φ(a) = b, φ(b) = a |
| 11 | 19761 | ⟨a, b | aba=b, baabb=ba⟩ | φ(a) = b, φ(b) = a |
| 11 | 19764 | ⟨a, b | aba=b, babab=ab⟩ | φ(a) = b, φ(b) = a |
| 11 | 20269 | ⟨a, b | aba=b, aaba=bbb⟩ | φ(a) = b, φ(b) = a |
| 11 | 20293 | ⟨a, b | aba=b, abbb=aab⟩ | φ(a) = b, φ(b) = a |
| 11 | 20294 | ⟨a, b | aba=b, abbb=aba⟩ | φ(a) = b, φ(b) = a |
| 11 | 20308 | ⟨a, b | aba=b, babb=aba⟩ | φ(a) = b, φ(b) = a |
| 11 | 20310 | ⟨a, b | aba=b, babb=baa⟩ | φ(a) = b, φ(b) = a |