By constructing a special cone in and the fixed point theorem, this paper investigates second-order singular semipositone periodic boundary value problems with dependence on the first-order derivative and obtains the existence of multiple positive solutions. Further, an example is given to demonstrate the applications of our main results.
Huiqin Lu. "Multiple Positive Solutions for Singular Semipositone Periodic Boundary Value Problems with Derivative Dependence." J. Appl. Math. 2012 1 - 12, 2012. https://doi.org/10.1155/2012/295209