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math.CA2024
On extremal problems of Delsarte type for positive definite functions on LCA groups
Elena E. Berdysheva, Mita D. Ramabulana, Szilárd Gy. Révész
A unifying framework for some extremal problems on locally compact Abelian groups is considered, special cases of which include the Delsarte and Turán extremal problems. A slight v…
math.CA2024
On the Existence of an Extremal Function for the Delsarte Extremal Problem
Mita Dimpho Ramabulana
In the general setting of a locally compact Abelian group , the Delsarte extremal problem asks for the supremum of integrals over the collection of continuous positive definite…