Elliptic pseudo-differential operators
Yu. V. Egorov, Bert‐Wolfgang Schulze · Birkhäuser Basel eBooks · 1997
A pseudo-differential operator P with a symbol p ∈ S m (Ω) is elliptic in Ω, if for any compact subset K ⊂ Ω there exist positive constants c and C such that p ( x ,ξ)≥ c ξ m for ξ ≥ C These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.