I. Rachůnková,  S. Staněk

Sturm-Liouville and focal higher order BVPs with singularities in phase variables

The paper deals with the existence of solutions for singular higher order differential equations with Sturm-Liouville or ($p,n-p$) right focal boundary conditions or the ($n-p,p$) left focal boundary conditions. Right-hand sides of differential equations may be singular in the zero values of all their phase variables. The proofs are based on the regularization and sequential techniques.