Systems of partial differential equations and Lie by J. Pommaret
By J. Pommaret
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Extra resources for Systems of partial differential equations and Lie pseudogroups
Example text
14) ¯ 2 M# 0 (Ω, R ), Aµ,Ω = sup ¯ Ω L2 (Ω) ≤ √ L2 (Ω) 2 ∇ϕ L2 (Ω) . 14) is achieved by some unique ϕ ∈ H1 (Ω; R2 ) modulo ¯ R2 ) by Theorem 2 in [5] (when µ is an L1 constants; moreover, ϕ ∈ (L∞ ∩ C)(Ω; function — the case of measures is similar). ¯ 2 Thus we have for every µ ∈ M# 0 (Ω, R ) µ . 15) ¯ 2 AΩ = sup Aµ,Ω : µ ∈ M# 0 (Ω, R ) and µ ≤ 1 . 10. One has 1 1 √ < AΩ ≤ √ . 15) is achieved. Proof. Let µ = λt H1 ∂B(x0 , r) with ∂B(x0 , r) ⊂ Ω and (x − x0 )⊥ r2 (x − x0 )⊥ |x−x 2 0| ϕ(x) = if |x − x0 | ≤ r , if |x − x0 | > r .
GP] D. Girela, J. A. Pel´ aez, Boundary behaviour of analytic functions in spaces of Dirichlet type, J. Inequal. Appl. 2006, Art. ID 92795, 12 pp. [KV] N. Kalton, I. Verbitsky. Nonlinear equations and weighted norm inequalities, Trans. Amer. Math. Soc. 351 (1999), no. 9, 3441–3497. odinger op[KS] R. Sawyer, The trace inequality and eigenvalue estimates for Schr¨ erators, Ann. Inst. Fourier (Grenoble) 36 (1986), no. 4, 207–228. [Ki] J. Kinney, Tangential limits of functions of the class Sα , Proc.
Thus DF (3) ∈ l2 (T, 2−εd(α) ). We now use the same arguments as before. Set G = I(DF (3) ); G will have finite radial limits along every geodesic Γ with the possible exception of a set which is a null set for every Carleson measure for the space Dd,ε . Also as in the previous proof, any boundary point Γ at which I(DF (3) )(Γ) < ∞ will be a boundary point where we have good convergence of F ; in this case the good convergence meaning convergence over Γ3 (ε). The description of the Carleson measures for these spaces is given in [AR].