#20245 ⟨
a
,
b
|
aba
=
a
,
bbbb
=
abb
⟩
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Monoids with two generators and two relations
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#20243
⟨
a
,
b
|
aba
=
a
,
bbbb
=
aab
⟩
Next:
#20246
⟨
a
,
b
|
aba
=
a
,
bbbb
=
bab
⟩
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
7
⇒
b
4
[3]
2.
a
b
2
⇒
b
4
[2]
3.
aba
⇒
a
[1]
# ab:aba=a,bbbb=abb b/a bbbbbbb=bbbb abb=bbbb aba=a