English

Simultaneous generic approximation by the iterates of the Cesaro operator

Functional Analysis 2012-11-06 v1

Abstract

We show that for the generic sequence (a) of elements in a subset A of a separable locally convex metrisable space V, the sequences [T^k(a)]_n, n=1,2,... are dense in the convex hull convA of A for all k=1,2,...; where T is the Cesaro operator. Further, if convA is dense in V, then for every sequence x_k of elements of V, k=1,2,... there exists a sequence of indices l_n, n=1,2,..., such that, we have the simultaneous approximation that [T^k(a)]_(l_n) converges to x_k as n tends to infinity for all k=1,2,... These phenomena are topologically generic and in the case where A is a vector space they are algebraically generic.

Cite

@article{arxiv.1211.0783,
  title  = {Simultaneous generic approximation by the iterates of the Cesaro operator},
  author = {Theodosios Douvropoulos},
  journal= {arXiv preprint arXiv:1211.0783},
  year   = {2012}
}

Comments

33 pages

R2 v1 2026-06-21T22:32:48.417Z