CLONES, COCLONES AND COCONNECTED SPACES
Acta mathematica Universitatis Comenianae, Tome 69 (2000) no. 2
V. Trnkova. CLONES, COCLONES AND COCONNECTED SPACES. Acta mathematica Universitatis Comenianae, Tome 69 (2000) no. 2. http://geodesic.mathdoc.fr/item/AMUC_2000_69_2_a9/
@article{AMUC_2000_69_2_a9,
     author = {V. Trnkova},
     title = {CLONES, {COCLONES} {AND} {COCONNECTED} {SPACES}},
     journal = {Acta mathematica Universitatis Comenianae},
     year = {2000},
     volume = {69},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/AMUC_2000_69_2_a9/}
}
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Voir la notice de l'article provenant de la source Comenius University

Clones and coclones motivate this examination of coconnected spaces. A space $X$ is coconnected if every continuous map $X\times X\to X$ depends only on one variable. We prove here that every monoid can be represented as the monoid of all nonconstant continuous selfmaps of a coconnected space and that, within the class of Hausdorff spaces, the coconnectedness is not expressible by a sentence of the first order language of the monoid theory: we construct two Hausdorff spaces with isomorphic monoids of all continuous selfmaps such that one of them is coconnected and the other is not.