#20048 ⟨
a
,
b
|
aab
=
b
,
aaaa
=
aaa
⟩
Up:
Monoids with two generators and two relations
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#20047
⟨
a
,
b
|
aab
=
a
,
bbbb
=
bbb
⟩
Next:
#20051
⟨
a
,
b
|
aab
=
b
,
aaaa
=
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.
ab
⇒
b
[3]
2.
a
4
⇒
a
3
[2]
# ab:aab=b,aaaa=aaa ab ab=b aaaa=aaa