#4162 ⟨a, b | abb=aab, bbb=a⟩
Contents
- Properties
- Commutative structure
- Finite structure
- Staircase diagram
- Cayley table
- Right Cayley graph
- Rewriting system
- Same cardinality
- Isomorphic instances
- Sum of relation sides is 10
- Isomorphic to ℕ(7 = 5)
- Finite commutative monoid with 7 elements
- Not cancellative, because multiplication by b4 is not injective:
-
b4 ⋅ b3 = b5 and b4 ⋅ b = b5, however b3 ≠ b
- Gröbner basis: ⟨a, b | b7=b5, a=b3⟩
- Cancellative quotient is isomorphic to ℤ2
- Enveloping group is isomorphic to ℤ2
- Group of units is isomorphic to ℤ1
- 2 Archimedian components:
An idempotent element x satisfies x2 = x.
The index and period of x is the least m (index) and n (period) such that x(m+n) = xm.
- 1 non-trivial idempotent:
- Order of generators:
- a: index 2, period 2
- b: index 5, period 2
- Histogram:
| index 1, period 1 | 1 element | b6 |
| index 1, period 2 | 1 element | b5 |
| index 2, period 1 | 1 element | b4 |
| index 2, period 2 | 1 element | b3 |
| index 3, period 1 | 1 element | b2 |
| index 5, period 2 | 1 element | b |
Idempotents are shown in bold.
|
1 | b | b2 | b3 | b4 | b5 | b6 |
| 1 | 1 | b | b2 | b3 | b4 | b5 | b6 |
| b | b | b2 | b3 | b4 | b5 | b6 | b5 |
| b2 | b2 | b3 | b4 | b5 | b6 | b5 | b6 |
| b3 | b3 | b4 | b5 | b6 | b5 | b6 | b5 |
| b4 | b4 | b5 | b6 | b5 | b6 | b5 | b6 |
| b5 | b5 | b6 | b5 | b6 | b5 | b6 | b5 |
| b6 | b6 | b5 | b6 | b5 | b6 | b5 | b6 |
Idempotents are shown in bold.
- Reduction order:
- Left-to-right recursive path with deg(b) = 0; deg(a) = 1
- Certificate: derivations of all rewriting rules from the defining relations.
# ab:abb=aab,bbb=a b/a - -
bbbbbbb=bbbbb
a=bbb
22 unique, 1181 total
| Σ | # | Presentation | Properties | Description | φ |
| 7 | 116 | ⟨a, b | aaa=b, abb=1⟩ | Grp Com 7 | ℤ7 | 763 |
| 8 | 577 | ⟨a, b | aaa=b, abb=a⟩ | Noc Com 7 | ℕ(7 = 1) | 59 |
| 8 | 578 | ⟨a, b | aaa=b, abb=b⟩ | Noc Com 7 | ℕ(7 = 3) | 44 |
| 8 | 913 | ⟨a, b | aa=b, abbb=b⟩ | Noc Com 7 | ℕ(7 = 2) | 82 |
| 8 | 937 | ⟨a, b | ab=a, baaa=b⟩ | Noc 7 | | 66 |
| 9 | 1593 | ⟨a, b | aaa=ab, baa=b⟩ | Noc 7 | | 3 |
| 9 | 1601 | ⟨a, b | aaa=bb, aab=b⟩ | Noc Com 7 | | 5 |
| 9 | 1620 | ⟨a, b | aab=aa, bbb=a⟩ | Noc Com 7 | ℕ(7 = 6) | 35 |
| 9 | 1632 | ⟨a, b | aab=ab, bbb=a⟩ | Noc Com 7 | ℕ(7 = 4) | 50 |
| 9 | 2074 | ⟨a, b | aab=b, babb=a⟩ | Noc Com 7 | | 20 |
| 9 | 2231 | ⟨a, b | ab=aa, aaa=bb⟩ | Noc 7 | | 3 |
| 9 | 2271 | ⟨a, b | bb=aa, aaa=ab⟩ | Noc 7 | | 3 |
| 9 | 3197 | ⟨a, b | ab=a, bbb=baa⟩ | Noc 7 | | 5 |
| 10 | 6251 | ⟨a, b | aaa=a, aabba=b⟩ | Noc 7 | | 1 |
| 10 | 8987 | ⟨a, b | ab=a, aaaaa=bb⟩ | Noc Com 7 | | 5 |
| 10 | 9108 | ⟨a, b | ab=a, bbbbb=aa⟩ | Noc Com 7 | | 2 |
| 10 | 9110 | ⟨a, b | ab=a, bbbbb=ba⟩ | Noc 7 | | 1 |
| 10 | 9263 | ⟨a, b | ab=a, aaaa=bbb⟩ | Noc Com 7 | | 4 |
| 10 | 9375 | ⟨a, b | ab=a, bbba=bbb⟩ | Noc 7 | | 3 |
| 10 | 9376 | ⟨a, b | ab=a, bbbb=aaa⟩ | Noc Com 7 | | 3 |
| 10 | 9382 | ⟨a, b | ab=a, bbbb=bba⟩ | Noc 7 | | 1 |
| 11 | 14843 | ⟨a, b | abba=b, aabab=a⟩ | Noc 7 | | 1 |
The mapping is from the listed presentation's alphabet to the current rewriting system's alphabet.
42 total
| Σ | # | Presentation | Mapping |
| 10 | 4170 | ⟨a, b | abb=aba, bbb=a⟩ | φ(a) = bbb, φ(b) = b |
| 10 | 4182 | ⟨a, b | baa=abb, bbb=a⟩ | φ(a) = bbb, φ(b) = b |
| 10 | 4188 | ⟨a, b | bab=aab, bbb=a⟩ | φ(a) = bbb, φ(b) = b |
| 10 | 4192 | ⟨a, b | bab=aba, bbb=a⟩ | φ(a) = bbb, φ(b) = b |
| 10 | 6383 | ⟨a, b | aab=b, aaaaa=b⟩ | φ(a) = b, φ(b) = bbbbb |
| 10 | 6487 | ⟨a, b | aba=b, aaaaa=b⟩ | φ(a) = b, φ(b) = bbbbb |
| 10 | 9231 | ⟨a, b | aa=b, abbb=abb⟩ | φ(a) = b, φ(b) = bb |
| 10 | 9233 | ⟨a, b | aa=b, abbb=bab⟩ | φ(a) = b, φ(b) = bb |
| 10 | 9234 | ⟨a, b | aa=b, abbb=bba⟩ | φ(a) = b, φ(b) = bb |
| 10 | 9245 | ⟨a, b | aa=b, babb=abb⟩ | φ(a) = b, φ(b) = bb |
| 10 | 9247 | ⟨a, b | aa=b, babb=bab⟩ | φ(a) = b, φ(b) = bb |
| 10 | 9248 | ⟨a, b | aa=b, babb=bba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 12608 | ⟨a, b | abbb=ab, bbbb=a⟩ | φ(a) = bbbb, φ(b) = b |
| 11 | 12610 | ⟨a, b | abbb=ba, bbbb=a⟩ | φ(a) = bbbb, φ(b) = b |
| 11 | 12634 | ⟨a, b | babb=ab, bbbb=a⟩ | φ(a) = bbbb, φ(b) = b |
| 11 | 12636 | ⟨a, b | babb=ba, bbbb=a⟩ | φ(a) = bbbb, φ(b) = b |
| 11 | 19505 | ⟨a, b | aab=b, aaaaa=ab⟩ | φ(a) = b, φ(b) = bbbbbb |
| 11 | 19705 | ⟨a, b | aba=b, aaaaa=ab⟩ | φ(a) = b, φ(b) = bbbbbb |
| 11 | 25285 | ⟨a, b | aa=b, aaabb=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25287 | ⟨a, b | aa=b, aaabb=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25288 | ⟨a, b | aa=b, aaabb=bba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25299 | ⟨a, b | aa=b, aabab=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25301 | ⟨a, b | aa=b, aabab=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25302 | ⟨a, b | aa=b, aabab=bba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25307 | ⟨a, b | aa=b, aabba=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25309 | ⟨a, b | aa=b, aabba=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25310 | ⟨a, b | aa=b, aabba=bba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25323 | ⟨a, b | aa=b, abaab=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25325 | ⟨a, b | aa=b, abaab=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25326 | ⟨a, b | aa=b, abaab=bba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25331 | ⟨a, b | aa=b, ababa=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25332 | ⟨a, b | aa=b, ababa=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25367 | ⟨a, b | aa=b, baaab=abb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25368 | ⟨a, b | aa=b, baaab=bab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25746 | ⟨a, b | aa=b, abbb=aaab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25747 | ⟨a, b | aa=b, abbb=aaba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25749 | ⟨a, b | aa=b, abbb=abaa⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25755 | ⟨a, b | aa=b, baaa=abbb⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25767 | ⟨a, b | aa=b, babb=aaab⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25768 | ⟨a, b | aa=b, babb=aaba⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25770 | ⟨a, b | aa=b, babb=abaa⟩ | φ(a) = b, φ(b) = bb |
| 11 | 25774 | ⟨a, b | aa=b, babb=baaa⟩ | φ(a) = b, φ(b) = bb |