L infinity is not separable proof

In this video we prove that the sequence space L infinity is not separable.
#Msc mathematics #Higher education #csir net 2023 #functional analysis

[@ritikadevi8399]

Which book should I follow for this topic?

[@mathonblackboard]

Introductory Functional Analysis with Applications, Wiley, 1989, ISBN 0-471-50459-9 is the book by Erwin Kreyszig I followed for functional analysis