  In this paper, we have described a denotational model of Intuitionist Linear
Logic which is also a differential category. Formulas are interpreted as
Mackey-complete topological vector space and linear proofs are interpreted by
bounded linear functions. So as to interpret non-linear proofs of Linear Logic,
we have used a notion of power series between Mackey-complete spaces,
generalizing the notion of entire functions in C. Finally, we have obtained a
quantitative model of Intuitionist Differential Linear Logic, where the
syntactic differentiation correspond to the usual one and where the
interpretations of proofs satisfy a Taylor expansion decomposition.
