#461 ⟨
a
,
b
|
aabbba
=
aa
⟩
Up:
Monoid enumeration
Prev:
#460
⟨
a
,
b
|
aabbab
=
bb
⟩
Next:
#462
⟨
a
,
b
|
aabbba
=
ab
⟩
Contents
Properties
Rewriting system
Properties
Sum of relation sides is 8
Infinite non-cancellative non-commutative monoid
Element
a
has infinite order
Not left cancellative, because left multiplication by
a
is not injective:
a
⋅
a
b
3
a
=
a
2
and
a
⋅
a
=
a
2
, however
a
b
3
a
≠
a
Not right cancellative, because right multiplication by
a
is not injective:
a
2
b
3
⋅
a
=
a
2
and
a
⋅
a
=
a
2
, however
a
2
b
3
≠
a
Rewriting system
Format:
Pretty
Plain
Word:
Enter a word above to compute its normal form. Tips:
Lowercase letters stand for generators.
Spaces are ignored.
Numbers repeat the previous letter, e.g.
b90
.
Strategy:
Leftmost
Rightmost
Result:
1
1
Reduction order:
Left-to-right shortlex with
a
<
b
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
a
2
b
3
a
⇒
a
2
[1]
# ab:aabbba=aa ab - - aabbba=aa