Mathematical Structures: History of Monadic algebras

[Home]History of Monadic algebras

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Revision 2 . . July 29, 2004 12:50 am by Jipsen
Revision 1 . . July 9, 2004 10:19 am by Jipsen
  

Difference (from prior major revision) (no other diffs)

Changed: 28,30c28,29
\Large Name of class
\quad\href{http://math.chapman.edu/cgi-bin/structures?action=edit;id=Template}{edit}
% Note: replace "Template" with Name_of_class in previous line
\Large Monadic algebras
\quad\href{http://math.chapman.edu/cgi-bin/structures?action=edit;id=Monadic_algebras}{edit}

Changed: 32c31
\abbreviation{Abbr}
\abbreviation{MonA}

Changed: 35,36c34
A ... is a structure $\mathbf{A}=\langle A,...\rangle$ of type $\langle
...\rangle$ such that
A monadic algebra is a structure $\mathbf{A}=\langle A, \vee, 0, \wedge, 1, \neg, f\rangle$ of type $\langle 2, 0, 2, 0, 1, 1\rangle$ such that

Changed: 38c36
$\langle A,...\rangle$ is a \href{Name_of_class.pdf}{name of class}
$\langle A, \vee, 0, \wedge, 1, \neg\rangle$ is a \href{Boolean_algebras.pdf}{Boolean algebra}

Changed: 40c38
$op_1$ is (name of property): $axiom_1$
$f$ is a unary closure operator: $f(x\vee y)=f(x)\vee f(y)$, $f(0)=0$, $x\le f(x)=f(f(x))$

Changed: 42c40
$op_2$ is ...: $...$
$f$ is self conjugated: $f(x)\wedge y=0\iff x\wedge f(y)=0$

Changed: 51,52c49,52
Let $\mathbf{A}$ and $\mathbf{B}$ be ... . A morphism from $\mathbf{A}$ to $\mathbf{B}$ is a function $h:A\rightarrow B$ that is a homomorphism:
$h(x ... y)=h(x) ... h(y)$
Let $\mathbf{A}$ and $\mathbf{B}$ be monodic algebras. A morphism from $\mathbf{A}$ to $\mathbf{B}$ is a function $h:A\rightarrow B$ that is a homomorphism:
$h(x \vee y)=h(x) \vee h(y)$,
$h(\neg x)=\neg h(x)$,
$h(f(x))=f(h(x))$.

Changed: 78,79c78,79
Classtype & (value, see description) \cite{Ln19xx} \\\hline
Equational theory & \\\hline
Classtype & variety \\\hline
Equational theory & decidable\\\hline

Changed: 84,92c84,92
Congruence distributive & \\\hline
Congruence modular & \\\hline
Congruence $n$-permutable & \\\hline
Congruence regular & \\\hline
Congruence uniform & \\\hline
Congruence extension property & \\\hline
Definable principal congruences & \\\hline
Equationally def. pr. cong. & \\\hline
Amalgamation property & \\\hline
Congruence distributive & yes\\\hline
Congruence modular & yes\\\hline
Congruence $n$-permutable & yes, $n=2$\\\hline
Congruence regular & yes\\\hline
Congruence uniform & yes\\\hline
Congruence extension property & yes\\\hline
Definable principal congruences & yes\\\hline
Equationally def. pr. cong. & yes\\\hline
Amalgamation property & yes\\\hline

Changed: 103c103
f(2)= &\\
f(2)= &1\\

Changed: 128c128
\href{....pdf}{...} supervariety
\href{Boolean_algebras.pdf}{Boolean algebras} reduced type

Changed: 130c130
\href{....pdf}{...} subreduct
\href{Closure_algebras.pdf}{Closure algebras}

Changed: 136c136
\bibitem{Ln19xx}
\bibitem{Lastname19xx}

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