Peak sets in real-analytic convex boundaries
Author(s) -
Rachid Belhachemi
Publication year - 1998
Publication title -
pacific journal of mathematics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 52
eISSN - 1945-5844
pISSN - 0030-8730
DOI - 10.2140/pjm.1998.185.209
Subject(s) - mathematics , regular polygon , convex set , geometry , convex optimization
Throughtout this paper we will denote by D a smoothly bounded domain in C with defining function r. We denote by A∞(D) the set of holomorphic functions in D which have C∞-extension to D. First, we give the necessary definitions and notations needed in this paper. A closed subset K ⊂ ∂D is a peak set for A∞(D) if there exists a function f ∈ A∞(D) so that f = 1 on K and |f | 0 on D \K. Such a function g is called a strong support function for K. We denote by Tp(M) the real tangent space to a smooth manifold M at the point p ∈ M. For a point p ∈ M , the complex tangent space of M at p denoted by T C p (M) is the maximal complex subspace of Tp(M), of complex dimension n− 1 if M = ∂D. A C∞-submanifold M ⊆ ∂D is integral at p ∈M if Tp(M) ⊆ T C p (∂D). M is an integral manifold if it is integral at each point p ∈M. A C∞-submanifold M ⊂ ∂D is totally real if T C p (M) = {0} for every p ∈M. We denote by w(∂D) the set of weakly pseudoconvex boundary points. For p ∈ ∂D, we let Np denote the null space in T C p (∂D) of the Levi form at
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom