Theorems on the existence and uniqueness of a solution to the third order linear functional differential equation satisfying periodic conditions are established in the paper. The question on the non-negativity of a solution to the considered boundary value problem is also studied.
Theorems on the existence and uniqueness of a solution to the third order linear functional differential equation satisfying periodic conditions are established in the paper. The question on the non-negativity of a solution to the considered boundary value problem is also studied. (en)