=====Allegories===== Abbreviation: **All** ====Definition==== An \emph{allegory} is an expanded [[category]] $\mathbf{M}=\langle M,\circ,\text{dom},\text{rng},\text{id},\vee,\wedge,^\smile\rangle$ such that $...$ is ...: $...$ $...$ is ...: $...$ Remark: This is a template. It is not unusual to give several (equivalent) definitions. Ideally, one of the definitions would give an irredundant axiomatization that does not refer to other classes. ==Morphisms== Let $\mathbf{A}$ and $\mathbf{B}$ be allegories. A morphism from $\mathbf{A}$ to $\mathbf{B}$ is a functor $F:A\rightarrow B$ that also preserves the new operations: $h(x ... y)=h(x) ... h(y)$ ====Definition==== An \emph{...} is a structure $\mathbf{A}=\langle A,...\rangle$ of type $\langle ...\rangle$ such that $...$ is ...: $axiom$ $...$ is ...: $axiom$ ====Examples==== Example 1: ====Basic results==== ====Properties==== Feel free to add or delete properties from this list. The list below may contain properties that are not relevant to the class that is being described. ^[[Classtype]] |partial algebras | ^[[Equational theory]] | | ^[[Quasiequational theory]] | | ^[[First-order theory]] | | ^[[Locally finite]] | | ^[[Residual size]] | | ^[[Congruence distributive]] | | ^[[Congruence modular]] | | ^[[Congruence $n$-permutable]] | | ^[[Congruence regular]] | | ^[[Congruence uniform]] | | ^[[Congruence extension property]] | | ^[[Definable principal congruences]] | | ^[[Equationally def. pr. cong.]] | | ^[[Amalgamation property]] | | ^[[Strong amalgamation property]] | | ^[[Epimorphisms are surjective]] | | ====Finite members==== $\begin{array}{lr} f(1)= &1\\ f(2)= &\\ f(3)= &\\ f(4)= &\\ f(5)= &\\ \end{array}$ $\begin{array}{lr} f(6)= &\\ f(7)= &\\ f(8)= &\\ f(9)= &\\ f(10)= &\\ \end{array}$ ====Subclasses==== [[...]] subvariety [[...]] expansion ====Superclasses==== [[...]] supervariety [[...]] subreduct ====References==== %[(Ln19xx> %F. Lastname, \emph{Title}, Journal, \textbf{1}, 23--45 [[MRreview]] )]