#3428 ⟨
a
,
b
|
aaabaaaaab
=
b
⟩
Up:
Monoid enumeration
Prev:
#3427
⟨
a
,
b
|
aaabaaaaab
=
a
⟩
Next:
#3429
⟨
a
,
b
|
aaabaaaaba
=
a
⟩
Contents
Properties
Rewriting system
Properties
Sum of relation sides is 11
Infinite non-cancellative non-commutative monoid
Element
a
has infinite order
Not right cancellative, because right multiplication by
b
is not injective:
a
3
b
a
5
⋅
b
=
b
and 1 ⋅
b
=
b
, however
a
3
b
a
5
≠ 1
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.
b
a
5
b
⇒
a
(
a
2
b
)
2
[2]
2.
a
6
b
a
2
b
⇒
b
[3]
# ab:aaabaaaaab=b ab - - baaaaab=aaabaab aaaaaabaab=b