×

On some maximum principles involving harmonic functions and their derivatives. (English) Zbl 0402.35014


MSC:

35B50 Maximum principles in context of PDEs
31B05 Harmonic, subharmonic, superharmonic functions in higher dimensions
35J15 Second-order elliptic equations
31B15 Potentials and capacities, extremal length and related notions in higher dimensions
35B05 Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs
Full Text: DOI