Aim of this short note is to study Shannon's entropy power along entropic interpolations, thus generalizing Costa's concavity theorem. We shall provide two proofs of independent interest: the former by G-calculus, hence applicable to more abstract frameworks; the latter with an explicit remainder term, reminiscent of Villani (IEEE Trans. Inf. Theory, 2006), allowing us to characterize the case of equality.
机构:
Govt Coll Univ, Abdus Salam Sch Math Sci, Lahore 54600, Pakistan
Univ Zagreb, Fac Text Technol, Zagreb 10000, CroatiaUniv Sargodha, Dept Math, Sargodha, Pakistan