#16402 ⟨
a
,
b
|
aba
=
ab
,
abbb
=
ab
⟩
Up:
Monoids with two generators and two relations
Prev:
#16401
⟨
a
,
b
|
aba
=
ab
,
abbb
=
aa
⟩
Next:
#16404
⟨
a
,
b
|
aba
=
ab
,
abbb
=
bb
⟩
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.
aba
⇒
ab
[1]
2.
a
b
2
a
⇒
a
b
2
[3]
3.
a
b
3
⇒
ab
[2]
# ab:aba=ab,abbb=ab ab aba=ab abba=abb abbb=ab