In Global South countries, ageing is an incoming phenomenon with socio-spatial implications that are not much explored yet. North countries already facing trends significant territorial consequences, such as declining populations contribute to making certain areas marginal. However, different factors may determine the marginality of a municipality or region in other settings. Drawing on these p...

For a large class of finite W algebras, the defining relations of a Yangian are proved to be satisfied. Therefore such finite W algebras appear as realisations of Yangians. This result is useful to determine properties of such W algebra representations. Talk presented by P. Sorba at NEEDS’97 (Kolymbari, Creta, June 1997), VIII Regional Conference on Math. Phys. (Nor Amberd, Armenia, July 1997),...