Abbreviation: IRL
An \emph{integral residuated lattice} is a residuated lattice L=⟨L,∨,∧,⋅,1,∖,/⟩ that is
\emph{integral}: x≤1
Let A and B be integal residuated lattices. A morphism from A to B is a function h:A→B that is a homomorphism: h(x∨y)=h(x)∨h(y), h(x∧y)=h(x)∧h(y), h(x⋅y)=h(x)⋅h(y), h(x∖y)=h(x)∖h(y), h(x/y)=h(x)/h(y), h(1)=1
Example 1: The negative cone of any l-group, e.g., Z−
Classtype | variety |
---|---|
Equational theory | decidable |
Quasiequational theory | decidable |
First-order theory | undecidable |
Locally finite | no |
Residual size | unbounded |
Congruence distributive | yes |
Congruence modular | yes |
Congruence n-permutable | yes |
Congruence regular | no |
Congruence e-regular | yes |
Congruence uniform | no |
Congruence extension property | no |
Definable principal congruences | no |
Equationally def. pr. cong. | no |
Amalgamation property | |
Strong amalgamation property | |
Epimorphisms are surjective |
$\begin{array}{lr}
f(1)= &1\\ f(2)= &1\\ f(3)= &2\\ f(4)= &9\\ f(5)= &49\\
\end{array}\begin{array}{lr}
f(6)= &364\\ f(7)= &\\ f(8)= &\\ f(9)= &\\ f(10)= &\\
\end{array}$