#5379 ⟨
a
,
b
|
ababbba
=
bbba
⟩
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Monoid enumeration
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#5378
⟨
a
,
b
|
ababbba
=
bbab
⟩
Next:
#5380
⟨
a
,
b
|
ababbba
=
bbbb
⟩
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
c
is not injective:
aba
⋅
c
=
c
and 1 ⋅
c
=
c
, however
aba
≠ 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
Auxiliary generators:
c
=
bbba
Reduction order:
Left-to-right shortlex with
a
<
c
<
b
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
abac
⇒
c
[4]
2.
b
3
a
⇒
c
[2]
3.
b
3
c
⇒
cbac
[5]
# ab:ababbba=bbba acb bbba=c magic:0 abac=c bbba=c bbbc=cbac