#10612 ⟨
a
,
b
|
aaaa
=
aaa
,
bbbb
=1⟩
Up:
Monoids with two generators and two relations
Prev:
#10537
⟨
a
,
b
|
aa
=1,
bbbb
=
babb
⟩
Next:
#10627
⟨
a
,
b
|
aaaa
=
aab
,
bbbb
=1⟩
Quick links
Properties
Rewriting system
Properties
Presentation has sum-of-sides 11
Isomorphic to ℤ
4
∗ ℕ
(4 = 3)
Infinite non-commutative monoid
Rewriting system
Format:
Pretty
Plain
Word to reduce:
Tips:
Lowercase letters stand for generators.
Spaces are ignored.
Numbers repeat the previous letter, e.g.
b90
.
Reduction strategy:
Leftmost
Rightmost
Path to normal form:
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
4
⇒
a
3
[1]
2.
b
4
⇒ 1
[2]
# ab:aaaa=aaa,bbbb=1 ab aaaa=aaa bbbb=1