#16434 ⟨
a
,
b
|
aba
=
ab
,
bbbb
=
ab
⟩
Up:
Monoids with two generators and two relations
Prev:
#16431
⟨
a
,
b
|
aba
=
ab
,
bbba
=
ba
⟩
Next:
#16435
⟨
a
,
b
|
aba
=
ab
,
bbbb
=
ba
⟩
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 recursive path with deg(
b
) = 0; deg(
a
) = 1
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
b
8
⇒
b
5
[5]
2.
ab
⇒
b
4
[2]
3.
b
4
a
⇒
b
4
[4]
# ab:aba=ab,bbbb=ab b/a bbbbbbbb=bbbbb ab=bbbb bbbba=bbbb