#2940 ⟨
a
,
b
,
c
|
aab
=
b
,
bcb
=
c
⟩
Up:
Monoid enumeration
Prev:
#2939
⟨
a
,
b
,
c
|
aab
=
b
,
bcb
=
b
⟩
Next:
#2941
⟨
a
,
b
,
c
|
aab
=
b
,
bcc
=
a
⟩
Contents
Properties
Rewriting system
Properties
Sum of relation sides is 8
Infinite non-cancellative non-commutative monoid
Element
a
has infinite order
Not right cancellative, because right multiplication by
b
is not injective:
a
2
⋅
b
=
b
and 1 ⋅
b
=
b
, however
a
2
≠ 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
<
c
Certificate
: derivations of all rewriting rules from the defining relations.
#
Rule
Proof
1.
a
2
b
⇒
b
[1]
2.
a
2
c
⇒
c
[3]
3.
bcb
⇒
c
[2]
4.
c
2
b
⇒
b
c
2
[4]
# abc:aab=b,bcb=c abc - - aab=b aac=c bcb=c ccb=bcc