Nagata conjectured that everyM -space is homeomorphic to a closed subspace of the product of a countably compact space and a metric space. This conjecture was refuted by Burke and van Douwen, and A. Kato, independently. However, we can show that there is a c.c.c. poset P of size 2 such that in V P Nagata’s conjecture holds for each first countable regular space from the ground model (i.e. if a ...

Currently, there is little research focused on methodological processes to identify the motivation of returned migrant towards reintegration into society (Ramírez, García & Redondo, 2021; Tovar et al. 2018; (Meierricks Renner, 2017;Schiff, 2017; Muñóz Martínez, 2020). The objective this developing a process induction entrepreneurship for Mexican migrants, through system modules that complem...

This paper characterizes the development of modular branching structures that satisfy three assumptions: (a) subapical branching, meaning that new branches can be created only near the apices of the existing branches, (b) nite number of module types and states, and (c) absence of interactions between coexisting components of the growing structure. These assumptions are captured in the notion of...

The title compound, C(19)H(18)NO(3)P, was prepared by the reaction of diphenyl phospho-rochloridate and benzyl-amine. In the crystal structure, mol-ecules are linked via N-H⋯O=P hydrogen bonds into extended chains parallel to the c axis.

In the title compound, [Al(C(29)H(41)N(2))(C(2)H(2)N(2)P)(2)], the Al(III) atom is coordinated by four N atoms from β-diketiminate and 1,2,4-diaza-phospho-lide ligands in a slightly distorted tetra-hedral fashion.