Geodesic
In a left-topological semigroup with dense center the closure of any left ideal is an ideal.
Semigroup forum, Tome 36 (1987), pp. 247-248 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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Mots-clés : Stone-Čech compactification, Ellis compactification, abelian semitopological semigroup, ideal 
@article{SF_1987__36_134899,
     author = {W. Ruppert},
     title = {In a left-topological semigroup with dense center the closure of any left ideal is an ideal.},
     journal = {Semigroup forum},
     pages = {247--248},
     year = {1987},
     volume = {36},
     zbl = {0623.22004},
     url = {http://geodesic.mathdoc.fr/item/SF_1987__36_134899/}
}
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JO  - Semigroup forum
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SP  - 247
EP  - 248
VL  - 36
UR  - http://geodesic.mathdoc.fr/item/SF_1987__36_134899/
ID  - SF_1987__36_134899
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%0 Journal Article
%A W. Ruppert
%T In a left-topological semigroup with dense center the closure of any left ideal is an ideal.
%J Semigroup forum
%D 1987
%P 247-248
%V 36
%U http://geodesic.mathdoc.fr/item/SF_1987__36_134899/
%F SF_1987__36_134899
W. Ruppert. In a left-topological semigroup with dense center the closure of any left ideal is an ideal.. Semigroup forum, Tome 36 (1987), pp. 247-248. http://geodesic.mathdoc.fr/item/SF_1987__36_134899/