Publisher's Synopsis
Excerpt from Journal de Mathematiques Pures Et Appliquees, ou Recueil Mensuel de Memoires sur les Diverses Parties des Mathematiques, Vol. 13: Annee 1848
Demonstration geometrique de quelques theoremes relatifs a la theorie des sur faces; par M. J Bertrand.
Demonstration d'un theoreme de M. Gauss; par M. J. Bertrand.
Note a l'occasion de l'article precedent; par M. Digue.
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