Geodesic
Positive Quadratic Forms on Intersections of Quadrics
Matematičeskie zametki, Tome 71 (2002) no. 1, pp. 27-36

Voir la notice de l'article provenant de la source Math-Net.Ru

The positive definiteness of a quadratic form on the cone defined as the set of points at which given quadratic forms vanish or are nonnegative is studied. Necessary and sufficient conditions for the positivity of a quadratic form on this cone are obtained. The results are applied to study second-order sufficient conditions for abnormal extremal problems. 
@article{MZM_2002_71_1_a2,
     author = {A. V. Arutyunov},
     title = {Positive {Quadratic} {Forms} on {Intersections} of {Quadrics}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {27--36},
     publisher = {mathdoc},
     volume = {71},
     number = {1},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a2/}
}
TY  - JOUR
AU  - A. V. Arutyunov
TI  - Positive Quadratic Forms on Intersections of Quadrics
JO  - Matematičeskie zametki
PY  - 2002
SP  - 27
EP  - 36
VL  - 71
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a2/
LA  - ru
ID  - MZM_2002_71_1_a2
ER  - 
%0 Journal Article
%A A. V. Arutyunov
%T Positive Quadratic Forms on Intersections of Quadrics
%J Matematičeskie zametki
%D 2002
%P 27-36
%V 71
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a2/
%G ru
%F MZM_2002_71_1_a2
A. V. Arutyunov. Positive Quadratic Forms on Intersections of Quadrics. Matematičeskie zametki, Tome 71 (2002) no. 1, pp. 27-36. http://geodesic.mathdoc.fr/item/MZM_2002_71_1_a2/