Characterization of Compact Subsets of $\mathcal{A}^p$ with Respect to Weak Topology

Details Characterization of Compact Subsets of $\mathcal{A}^p$ with Respect to Weak Topology Characterization of Compact Subsets of $\mathcal{A}^p$ with Respect to Weak Topology

2008-04-17

arxiv.org/abs/0804.2873v1

Mathematics

Probability

8 pages

Scientific paper

In this brief article we characterize the relatively compact subsets of $\mathcal{A}^p$ for the topology $\sigma(\mathcal{A}^p,\mathcal{R}^q)$ (see below), by the weak compact subsets of $L^p$ . The spaces $\mathcal{R}^q$ endowed with the weak topology induced by $\mathcal{A}^p$, was recently employed to create the convex risk theory of random processes. The weak compact sets of $\mathcal{A}^p$ are important to characterize the so-called Lebesgue property of convex risk measures, to give a complete description of the Makcey topology on $\mathcal{R}^q$ and for their use in the optimization theory.

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