In this paper we study the reflexive subobject lattices and reflexive endomorphism algebras in a concrete category. For the category Set of sets and mappings, a complete characterization for both reflexive subobject lattices and reflexive endomorphism algebras is obtained. Some partial results are also proved for the category of abelian groups.

We propose an iterative algorithm for solving the reflexive solution of the quaternion matrix equation AXB + CXHD = F. When the matrix equation is consistent over reflexive matrix X, a reflexive solution can be obtained within finite iteration steps in the absence of roundoff errors. By the proposed iterative algorithm, the least Frobenius norm reflexive solution of the matrix equation can be d...

We introduce reflexive polytopes of index l as a natural generalisation of the notion of a reflexive polytope of index 1. These l-reflexive polytopes also appear as dual pairs. In dimension two we show that they arise from reflexive polygons via a change of the underlying lattice. This allows us to efficiently classify all isomorphism classes of l-reflexive polygons up to index 200. As another ...

The present study examines the uses of the reflexive marker in Lusaamia, a Bantu language of Kenya. In addition to being a true reflexive, the reflexive verbal prefix is also used in indirect reflexive constructions, as a middle voice / stative marker, and also to indicate when an action is being done for no particular purpose (when used in conjunction with a causative marker). I show that unac...

Answering an old problem in nonlinear theory, we show that c0 cannot be coarsely or uniformly embedded into a reflexive Banach space, but that any stable metric space can be coarsely and uniformly embedded into a reflexive space. We also show that certain quasi-reflexive spaces (such as the James space) also cannot be coarsely embedded into a reflexive space and that the unit ball of these spac...

Reflexive methodology was used to identify music collectors’ needs, that informed the development of conceptual prototypes which create moments of delightful distraction in their everyday lives. ARON: music lives in the cloud is a music listening and sharing system that enables ambient, non-task oriented experiences through networked biomorphic light forms equipped with a presence interface. AR...