JournalsaihpcVol. 7, No. 6Volume 7, No. 6 (1990) Annales de l'Institut Henri Poincaré Cpp. 505–523Prolongation of classical solutions and singularities of generalized solutionsMikio Tsujipp. 525–560Espaces de Krein et index des systèmes hamiltoniensV. Brousseaupp. 561–588Removable singularities for the Yang-Mills-Higgs equations in two dimensionsP.D. Smithpp. 589–601On the non-existence of energy stable minimal conesUlrich Dierkes