The density condition in quotients of quasinormable Fréchet spaces
Angela Albanese (1997)
Studia Mathematica
Similarity:
It is proved that a separable Fréchet space is quasinormable if, and only if, every quotient space satisfies the density condition of Heinrich. This answers positively a conjecture of Bonet and Dí az in the class of separable Fréchet spaces.