TheD-Property of Finite Unions oft-Metrizable Spaces and Certain Function Spaces

Xin Zhang, Hongfeng Guo
2013 Journal of Function Spaces and Applications  
The additivity ofD-property is studied ont-metrizable spaces and certain function spaces. It is shown that a space of countable tightness is aD-space provided that it is the union of finitely manyt-metrizable subspaces, or function spacesCp(Xi)where eachXiis LindelöfΣ.
doi:10.1155/2013/612954 fatcat:itr2b6zvfvfivof57soxkvhkx4