Elliptic differential equations constitute a fundamental class of partial differential equations that arise in the modelling of steady-state phenomena in physics, engineering, and beyond.

Abstract This paper mainly concerns oblique derivative problems for nonlinear nondivergent elliptic equations of second order with measurable coefficients in a multiply connected domain. Under certain ...

In this paper a method of realizing elliptic filters using signal-flow graphs is presented. Elliptic filters having a minimum number of capacitors are compared with those having a higher number of ...