Let S-Set be the category of $S$-sets, sets together with the actions of a semigroup $S$ on them. And, let S-Pos be the category of $S$-posets, posets together with the actions compatible with the orders on them. In this paper we show that the category S-Pos is a radical extension of S-Set; that is there is a radical on the category S-Pos, the order desolator radical, whose torsion-free class i...

Au 21e siecle, l’internationalisation est omnipresente, y compris dans l’enseignement superieur et la recherche. En effet, les etablissements se sont ouverts sur le monde depuis quelques dizaines d’annees, poursuivant l’objectif de former une communaute mondiale connaissance. Une chose certaine, ils devaient s’adapter, sans quoi, auraient disparu. Mais quelles consequences cette ouverture? Comm...

The asymmetric unit of the title hydrated salt, C22H26F2NO4(+)·Cl(-)·0.5H2O, consists of an (S,S,S,S)-nebivolol {nebivol = bis-[2-(6-fluoro-3,4-dihydro-2H-1-benzopyran-2-yl)-2-hy-droxy-eth-yl]ammonium} cation, a chloride anion and a half-occupancy water mol-ecule. The dihedral angle between the mean planes of the benzene rings is 50.34 (12)°. The pyran rings adopt half-chair conformations. The ...