Geodesic
For cones in Hilbert spaces, regularity is equivalent to self-duality
Matematičeskie zametki, Tome 64 (1998) no. 4, pp. 616-621 
V. T. Khudalov. For cones in Hilbert spaces, regularity is equivalent to self-duality. Matematičeskie zametki, Tome 64 (1998) no. 4, pp. 616-621. http://geodesic.mathdoc.fr/item/MZM_1998_64_4_a14/
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     title = {For cones in {Hilbert} spaces, regularity is equivalent to self-duality},
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Voir la notice de l'article provenant de la source Math-Net.Ru

The theorem stating that a cone in a Hilbert space is regular if and only if it is self-dual is proved and applied to obtain new proofs of earlier results.

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