New imidazolium-based polymeric ionic liquid gel with high adsorption capacity for perrhenate prepared by γ-radiation induced polymerization and crosslinking.

As is known, the Blaschke tensor A (a symmetric covariant 2-tensor) is one of the fundamental Möbius invariants in the Möbius differential geometry of submanifolds in the unit sphere S n , and the eigenvalues of A are referred to as the Blaschke eigenvalues. In this paper, we shall prove a classification theorem for immersed umbilic-free submanifolds in S n with a parallel Blaschke tensor. For proving this classification, some new kinds of examples are first defined.