#4863 ⟨
a
,
b
|
abbaabba
=
aba
⟩
Up:
Monoids with two generators and one relation
Prev:
#4862
⟨
a
,
b
|
abbaabba
=
aab
⟩
Next:
#4864
⟨
a
,
b
|
abbaabba
=
abb
⟩
Quick links
Properties
Rewriting system
Properties
Presentation has sum-of-sides 11
Infinite non-commutative monoid
Rewriting system
Format:
Pretty
Plain
Word to reduce:
Tips:
Lowercase letters stand for generators.
Spaces are ignored.
Numbers repeat the previous letter, e.g.
b90
.
Reduction strategy:
Leftmost
Rightmost
Path to normal form:
1
1
Reduction order:
Left-to-right shortlex with
a
<
b
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
a
b
2
a
2
ba
⇒
ab
a
2
b
2
a
[2]
2.
(
a
b
2
a
)
2
⇒
aba
[1]
# ab:abbaabba=aba ab abbaaba=abaabba abbaabba=aba