TY  - JOUR
AU  - Nachbin, Leopoldo
TI  - Compact unions of closed subsets are closed and compact intersections of open subsets are open
JO  - Portugaliae mathematica
PY  - 1992
SP  - 403
EP  - 409
VL  - 49
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_1992__49_4_115797/
LA  - en
ID  - PORMA_1992__49_4_115797
ER  -