#4623 ⟨a, b | aaaa=a, abba=b⟩

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Contents

  1. Properties
  2. Finite structure
  3. Right Cayley graph
  4. Left Cayley graph
  5. Rewriting system
  6. Same cardinality
  7. 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.

Right Cayley graph

Left Cayley graph

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. ba2 ⇒ ab2 [6]
2. b2a ⇒ a2b [5]
3. a4 ⇒ a [1]
4. a3b ⇒ b [3]
5. bab2 ⇒ a2ba [7]
6. b5 ⇒ a(ba)2 [9]
7. (ba)3 ⇒ (ab)3 [10]
# ab:aaaa=a,abba=b ab - -
baa=abb
bba=aab
aaaa=a
aaab=b
babb=aaba
bbbbb=ababa
bababa=ababab

Same cardinality

2 unique, 7 total

Σ#PresentationPropertiesφ
104625⟨a, b | aaaa=a, abbb=b⟩Noc 282
104691⟨a, b | aaab=b, babb=a⟩Noc 283

Isomorphic instances

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

1 total

Σ#PresentationMapping
1114348⟨a, b | aaaa=a, ababa=b⟩φ(a) = a, φ(b) = aab