Geodesic
On~deformations of nonsmooth optimization problems having an isolated extremal
Izvestiya. Mathematics , Tome 45 (1995) no. 1, pp. 187-195

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A deformation method is presented for investigating optimization problems with Lipschitz functionals on a Banach space. A deformation minimum principle is proved: under a special nondegenerate deformation of an optimization problem the property of being a local minimum point is preserved for an extremal if the corresponding extremal of the standard problem had that property. 
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     author = {V. I. Skalyga},
     title = {On~deformations of nonsmooth optimization problems having an isolated extremal},
     journal = {Izvestiya. Mathematics },
     pages = {187--195},
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     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1995_45_1_a8/}
}
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V. I. Skalyga. On~deformations of nonsmooth optimization problems having an isolated extremal. Izvestiya. Mathematics , Tome 45 (1995) no. 1, pp. 187-195. http://geodesic.mathdoc.fr/item/IM2_1995_45_1_a8/