#1650 ⟨a, b | aab=bb, baa=a⟩

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Contents

  1. Properties
  2. Finite structure
  3. Cayley table
  4. Right Cayley graph
  5. Left Cayley graph
  6. Rewriting system
  7. Same cardinality
  8. Isomorphic instances
  9. Anti-isomorphic instances

Properties

Finite structure

Elements in the center commute with all other elements.
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.

Cayley table

Idempotents are shown in bold.

1aba2aba3a2ba3b
11aba2aba3a2ba3b
aaa2aba3a2baa3bab
bba3a2baa3ba2aba2b
a2a2a3a2baa3ba2aba2b
ababaa3ba2aba3a2ba3b
a3a3aa3ba2aba3a2ba3b
a2ba2ba2aba3a2baa3bab
a3ba3ba3a2baa3ba2aba2b

Right Cayley graph

Idempotents are shown in bold.

Left Cayley graph

Idempotents are shown in bold.

Rewriting system

Format:
Word:
Enter a word above to compute its normal form. Tips:
  • Lowercase letters stand for generators.
  • Spaces are ignored.
  • Numbers repeat the previous letter, e.g. b90.
Strategy:
Result: 1 
1
#RuleProof
1. a4 ⇒ a [4]
2. ba ⇒ a3 [3]
3. b2 ⇒ a2b [1]
# ab:aab=bb,baa=a a/b - -
aaaa=a
ba=aaa
bb=aab

Same cardinality

33 unique, 1196 total

Σ#PresentationPropertiesDescriptionφ
7188⟨a, b | aab=1, bbbb=1⟩Grp Com 8ℤ8727
7330⟨a, b | aa=1, abba=b⟩Noc 860
8556⟨a, b | aba=b, aabb=1⟩Grp 828
8898⟨a, b | aa=a, bbbb=a⟩Noc Com 8ℕ(8 = 4)48
8918⟨a, b | aa=b, bbbb=a⟩Noc Com 8ℕ(8 = 1)34
8919⟨a, b | aa=b, bbbb=b⟩Noc Com 8ℕ(8 = 2)46
8961⟨a, b | aa=a, aba=bb⟩Noc 85
91605⟨a, b | aaa=bb, abb=b⟩Noc Com 8ℕ(8 = 3)55
91606⟨a, b | aaa=bb, bab=a⟩Noc Com 814
91615⟨a, b | aab=aa, baa=b⟩Noc 814
92206⟨a, b | ab=aa, bbbb=a⟩Noc Com 8ℕ(8 = 5)32
92220⟨a, b | bb=aa, aaab=a⟩Noc Com 822
92247⟨a, b | ab=aa, baa=bb⟩Noc 81
92256⟨a, b | ab=aa, bbb=aa⟩Noc 81
92258⟨a, b | ab=aa, bbb=ba⟩Noc 8
92883⟨a, b | aa=a, abbbb=b⟩Noc 814
93107⟨a, b | ab=a, baaa=bb⟩Noc 89
93123⟨a, b | ab=a, bbaa=bb⟩Noc 810
105191⟨a, b | aab=bb, aaaa=b⟩Noc Com 8ℕ(8 = 6)18
106664⟨a, b | aab=b, aaaa=ba⟩Noc 81
107057⟨a, b | ab=aa, aaaa=bb⟩Noc 87
109380⟨a, b | ab=a, bbbb=baa⟩Noc 82
1112606⟨a, b | abbb=aa, bbbb=a⟩Noc Com 8ℕ(8 = 7)14
1120047⟨a, b | aab=a, bbbb=bbb⟩Noc 8
1120051⟨a, b | aab=b, aaaa=abb⟩Noc Com 81
1124863⟨a, b | ab=a, aaaaaa=bb⟩Noc Com 8
1125112⟨a, b | ab=a, bbbbbb=aa⟩Noc Com 8
1125114⟨a, b | ab=a, bbbbbb=ba⟩Noc 8
1125411⟨a, b | ab=a, aaaaa=bbb⟩Noc Com 8
1125652⟨a, b | ab=a, bbbbb=aaa⟩Noc Com 8
1125658⟨a, b | ab=a, bbbbb=bba⟩Noc 8
1125897⟨a, b | ab=a, bbbb=aaaa⟩Noc Com 8
1125911⟨a, b | ab=a, bbbb=bbba⟩Noc 8

Isomorphic instances

The mapping is from the listed presentation's alphabet to the current rewriting system's alphabet.

4 total

Σ#PresentationMapping
105225⟨a, b | aba=aa, aaab=b⟩φ(a) = b, φ(b) = aaa
1115808⟨a, b | aba=aa, aaabb=b⟩φ(a) = b, φ(b) = aaa
1115812⟨a, b | aba=aa, aabab=b⟩φ(a) = b, φ(b) = aaa
1115818⟨a, b | aba=aa, abaab=b⟩φ(a) = b, φ(b) = aaa

Anti-isomorphic instances

The mapping is from the listed presentation's alphabet to the current rewriting system's alphabet.

11 total

Σ#PresentationMapping
92193⟨a, b | ab=aa, baaa=b⟩φ(a) = b, φ(b) = aa
92195⟨a, b | ab=aa, baab=b⟩φ(a) = b, φ(b) = aa
92197⟨a, b | ab=aa, baba=b⟩φ(a) = b, φ(b) = aa
92199⟨a, b | ab=aa, babb=b⟩φ(a) = b, φ(b) = aa
92201⟨a, b | ab=aa, bbaa=b⟩φ(a) = b, φ(b) = aa
92203⟨a, b | ab=aa, bbab=b⟩φ(a) = b, φ(b) = aa
92205⟨a, b | ab=aa, bbba=b⟩φ(a) = b, φ(b) = aa
1112491⟨a, b | abaa=aa, baaa=b⟩φ(a) = b, φ(b) = a
1119447⟨a, b | aab=a, baaab=bb⟩φ(a) = a, φ(b) = b
1119451⟨a, b | aab=a, baaba=bb⟩φ(a) = a, φ(b) = b
1119459⟨a, b | aab=a, babaa=bb⟩φ(a) = a, φ(b) = b