#5768 ⟨
a
,
b
,
c
|
aa
=
b
,
cbc
=
bc
⟩
Up:
Monoid enumeration
Prev:
#5767
⟨
a
,
b
,
c
|
aa
=
b
,
cbc
=
bb
⟩
Next:
#5772
⟨
a
,
b
,
c
|
aa
=
b
,
ccc
=
ac
⟩
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
d
is not injective:
ca
⋅
d
=
ad
and
a
⋅
d
=
ad
, however
ca
≠
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
Auxiliary generators:
d
=
ac
Reduction order:
Left-to-right recursive path with deg(
c
) = deg(
d
) = deg(
a
) = 0,
c
<
d
<
a
; deg(
b
) = 1
Certificate
: derivations of all rewriting rules from the defining relations.
Morphocompletion
: how the auxiliary generators were found.
#
Rule
Proof
1.
ac
⇒
d
[3]
2.
cad
⇒
ad
[5]
3.
a
2
d
⇒
dad
[6]
4.
b
⇒
a
2
[1]
# abc:aa=b,cbc=bc cda/b ac=d morph:2/1 ac=d cad=ad aad=dad b=aa