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La formule de la variation seconde de l’energie au voisinage d’une application harmonique. (French) Zbl 0301.53012

MSC:
53B20 Local Riemannian geometry
53C20 Global Riemannian geometry, including pinching
53C55 Global differential geometry of Hermitian and Kählerian manifolds
58E05 Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces
58E99 Variational problems in infinite-dimensional spaces
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