TY  - Type of reference 
TI  - Maximum principles and overdetermined problems for Hessian equations 
AU  - Cristian Enache 
AU  - Monica Marras 
AU  - Giovanni Porru 
AB  - In this article we investigate some Hessian type equations. Our main aim is to derive new maximum principles for some suitable P-functions, in the sense of L.E. Payne, that is for some appropriate functional combinations of $$${u(x)}$$$ and its derivatives, where $$${u(x)}$$$ is a solution of the given Hessian type equations. To find the most suitable P-functions, we first investigate the special case of a ball, where the solution of our Hessian equations is radial, since this case gives good hints on the best functional to be considered later, for general domains. Next, we construct some elliptic inequalities for the well-chosen P-functions and make use of the classical maximum principles to get our new maximum principles. Finally, we consider some overdetermined problems and show that they have solutions when the underlying domain has a certain shape (spherical or ellipsoidal). 
DO  - 10.21494/ISTE.OP.2021.0701 
JF  - Advances in Pure and Applied Mathematics 
KW  - Monge-Ampère equations,  Hessian Equations,  maximum principles,  overdetermined problems, Monge-Ampère equations,  Hessian Equations,  maximum principles,  overdetermined problems,  
L1  - http://openscience.fr/IMG/pdf/iste_apam21v12nspe_7.pdf 
LA  - en 
PB  - ISTE OpenScience 
DA  - 2021/07/28 
SN  - 1869-6090 
TT  - Principes du maximum et problèmes surdéterminés des équations Hessiennes 
UR  - http://openscience.fr/Maximum-principles-and-overdetermined-problems-for-Hessian-equations 
IS  - Issue 3 (Special AUS-ICMS 2020) 
VL  - 12 
ER  -