TY  - JOUR
AU  - W. Ruppert
TI  - In a left-topological semigroup with dense center the closure of any left ideal is an ideal.
JO  - Semigroup forum
PY  - 1987
SP  - 247
EP  - 248
VL  - 36
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SF_1987__36_134899/
ID  - SF_1987__36_134899
ER  -