Showing papers on "Legendre–Clebsch condition published in 1995"
TL;DR: In this paper, the authors investigated the property of having definite sign for a quadratic form in the calculus of variations that does not satisfy the strong Legendre condition and obtained necessary conditions (the condition?) of pointwise nature for the index of a form to be finite.
Abstract: This paper investigates the property of having definite sign for a quadratic form in the calculus of variations that does not satisfy the strong Legendre condition. New necessary conditions (the condition?) of pointwise nature are obtained for the index of a form to be finite. Under the assumption of the strong condition? a formula is obtained for the index of a form.
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