DEFECTIVE NUMBERS OF THE DIRICHLET PROBLEM FOR ONE EQUATION IN THE SIXTH ORDER PARTIAL DERIVATIVES
Keywords:
Dirichlet problem, defective numbers, nontrivial solutions of homogeneous Dirichlet problem, a properly elliptic equationAbstract
The Dirichlet problem in a unit disc for a sixth order properly elliptic equation is considered. At a certain arrangement of the roots of the characteristic equation, a new formula is obtained for determining the defective numbers. The conditions for the solvability and solution of the homogeneous problem are determined in an explicit form.