We are delighted to present this special issue in honor of Professor Jie Shen on the occasion of his sixtieth birthday in Journal of Mathematical Study (JMS) of
We study a kind of generalized porous medium equation with fractional Laplacian and abstract pressure term. For a large class of equations corresponding to the
In this paper, we concern the divergence Kohn-Laplace equation n∑i=1n∑j=1(X?j (aijXiu)+Y?j (bijYiu) +Tu= f?n∑i=1(X?ifi+Y?igi)with bounded coefficients on the