If someone asks you to determine whether two objects are the same, it might seem like a trivial request. In most everyday cases, a quick glance is enough for you to render an accurate judgment. But in ...
Bulletin mathématique de la Société des Sciences Mathématiques de Roumanie, Nouvelle Série, Vol. 47 (95), No. 1/2 (2004), pp. 15-21 (7 pages) An elementary proof of the existence of a (non-canonical) ...