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Published online by Cambridge University Press: 20 November 2018
The strong ϕ topology. Let S be a linear space of real sequences written in functional notation
There is a natural duality between S and the space ϕ of sequences which are eventually ϕ given by the equation
The series has only a finite number of nonzero terms since t is in ϕ.
A subset B of ϕ is called S-bounded if
for each s in S.