Uniform integrability of sequences of random elements with respect to weak topologies and weak integrals

In probability theory, uniform integrability of families of random variables or random el-ements plays an important role in the mean convergence. In this paper, we introduce a new version of uniform integrability for sequences in normed spaces in the weak sense. We study the relationship of this new concept with summability theory by considering statis-tical convergence. We also define a new type of uniform integrability of random elements taking values in topological vector spaces by considering weak integrals. Moreover, we study the connection of summability theory with this new concept as well.