Difference between revisions of "Magari theorem"
From Encyclopedia of Mathematics
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| − | The assertion that every [[Variety of universal algebras|variety of universal algebras]] with a non-trivial member contains also a member whose lattice of congruences is | + | {{TEX|done}} |
| + | The assertion that every [[Variety of universal algebras|variety of universal algebras]] with a non-trivial member contains also a member whose lattice of congruences is $2$-element. Such universal algebras are called congruence-simple or simple [[#References|[a1]]] (see also [[Universal algebra|Universal algebra]]). | ||
====References==== | ====References==== | ||
<table><TR><TD valign="top">[a1]</TD> <TD valign="top"> S. Burris, H.P. Sankappanavar, "A course in universal algebra" , Springer (1981)</TD></TR><TR><TD valign="top">[a2]</TD> <TD valign="top"> R. Magari, "Una dimonstrazione del fatto che ogni varietà ammette algebre semplici" ''Ann. Univ. Ferrara Sez. VII (N.S.)'' , '''14''' (1969) pp. 1–4</TD></TR><TR><TD valign="top">[a3]</TD> <TD valign="top"> B. Csákány, "Magari via Malcev" ''Algebra Universalis'' , '''36''' (1996) pp. 421–422</TD></TR></table> | <table><TR><TD valign="top">[a1]</TD> <TD valign="top"> S. Burris, H.P. Sankappanavar, "A course in universal algebra" , Springer (1981)</TD></TR><TR><TD valign="top">[a2]</TD> <TD valign="top"> R. Magari, "Una dimonstrazione del fatto che ogni varietà ammette algebre semplici" ''Ann. Univ. Ferrara Sez. VII (N.S.)'' , '''14''' (1969) pp. 1–4</TD></TR><TR><TD valign="top">[a3]</TD> <TD valign="top"> B. Csákány, "Magari via Malcev" ''Algebra Universalis'' , '''36''' (1996) pp. 421–422</TD></TR></table> | ||
Revision as of 21:44, 30 April 2014
The assertion that every variety of universal algebras with a non-trivial member contains also a member whose lattice of congruences is $2$-element. Such universal algebras are called congruence-simple or simple [a1] (see also Universal algebra).
References
| [a1] | S. Burris, H.P. Sankappanavar, "A course in universal algebra" , Springer (1981) |
| [a2] | R. Magari, "Una dimonstrazione del fatto che ogni varietà ammette algebre semplici" Ann. Univ. Ferrara Sez. VII (N.S.) , 14 (1969) pp. 1–4 |
| [a3] | B. Csákány, "Magari via Malcev" Algebra Universalis , 36 (1996) pp. 421–422 |
How to Cite This Entry:
Magari theorem. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Magari_theorem&oldid=32012
Magari theorem. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Magari_theorem&oldid=32012
This article was adapted from an original article by A. Muravitsky (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article