#5617 ⟨
a
,
b
|
aaabba
=
babaa
⟩
Up:
Monoids with two generators and one relation
Prev:
#5616
⟨
a
,
b
|
aaabba
=
baabb
⟩
Next:
#5618
⟨
a
,
b
|
aaabba
=
babab
⟩
Quick links
Properties
Rewriting system
Properties
Presentation has sum-of-sides 11
Infinite non-cancellative non-commutative monoid
Not right cancellative, because right multiplication by
a
is not injective:
a
3
b
2
⋅
a
=
bab
a
2
and (
ba
)
2
⋅
a
=
bab
a
2
, however
a
3
b
2
≠ (
ba
)
2
Enveloping group: ⟨
a
,
b
|
aaabba
-1
b
-1
a
-1
b
-1
⟩
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:
Right-to-left recursive path with deg(
a
) = 0; deg(
b
) = 1
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
bab
a
2
⇒
a
3
b
2
a
[1]
# ab:aaabba=babaa reversed:a/b babaa=aaabba