A polygonal complex in euclidean 3-space E3 is a discrete polyhedron-like structure with finite or infinite polygons as faces and finite graphs as vertex-figures, such that a fixed number r > 2 of faces surround each edge. It is said to be regular if its symmetry group is transitive on the flags. The present paper and its successor describe a complete classification of regular polygonal complex...

We construct a completely regular ordered space (X, T ,≤) such that X is an I-space, the topology T of X is metrizable and the bitopological space (X, T ♯,T ♭) is pairwise regular, but not pairwise completely regular. (Here T ♯ denotes the upper topology and T ♭ the lower topology of X.)

Describir las características clínicas de los pacientes tratados con evolocumab, razones del inicio la terapia y efectos tratamiento en fase inicial disponibilidad evolocumab unidades nefrología España. Estudio retrospectivo, observacional multicéntrico que incluye iniciaron (desde febrero 2016 a agosto 2018) 15 Se revisaron demográficas pacientes, el hipolipemiante evolución perfiles lipídicos...

r is called commuting regular ring (resp. semigroup) if for each x,y $in$ r thereexists a $in$ r such that xy = yxayx. in this paper, we introduce the concept of commuting$pi$-regular rings (resp. semigroups) and study various properties of them.