#1578 ⟨a, b | aaa=aa, aba=a⟩

Properties

Sum of relation sides is 9
Infinite non-cancellative non-commutative monoid
Element a²b² has infinite order
Not left cancellative, because left multiplication by a is not injective:
- a ⋅ ba = a and a ⋅ 1 = a, however ba ≠ 1
Not right cancellative, because right multiplication by a is not injective:
- ab ⋅ a = a and 1 ⋅ a = a, however ab ≠ 1

Format:	Pretty Plain
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:	Leftmost Rightmost
Result:	1 1

#	Rule	Proof
1.	a³ ⇒ a²	[1]
2.	aba ⇒ a	[2]

# ab:aaa=aa,aba=a ab - -
aaa=aa
aba=a

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

4 total

Σ	#	Presentation	Mapping
11	19639	⟨a, b \| aba=a, aaaba=aa⟩	φ(a) = a, φ(b) = b
11	19647	⟨a, b \| aba=a, aabaa=aa⟩	φ(a) = a, φ(b) = b
11	20183	⟨a, b \| aba=a, aaab=aab⟩	φ(a) = a, φ(b) = b
11	20190	⟨a, b \| aba=a, aaba=aaa⟩	φ(a) = a, φ(b) = b