Two Fixed-Point Theorems Related to Eigenvalues with the Solution of Kazdan-Warner's Problem on Elliptic Equations

摘要

The paper presents a proof of two fixed-point theorems, which unify previous results on periodic solutions of second-order ordinary differential equations, in the sense that the existence part of these solutions become a corollay of the fixed-point theorems. (Atomindex citation 13:676224)