Heating of the Beurling operator: Sufficient conditions for the two-weight case
Volume 186 / 2008
                    
                    
                        Studia Mathematica 186 (2008), 203-217                    
                                        
                        MSC: Primary 30Exx.                    
                                        
                        DOI: 10.4064/sm186-3-1                    
                                    
                                                Abstract
We establish sufficient conditions on the two weights $w$ and $v$ so that the Beurling–Ahlfors transform acts continuously from $L^2(w^{-1})$ to $L^2(v)$. Our conditions are simple estimates involving heat extensions and Green's potentials of the weights.
 
             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                             
                                                         
                                                            