1. MULTIPLE SOLUTIONS FOR A DOUBLE EIGENVALUE ELLIPTIC PROBLEM IN DOUBLE WEIGHTED SOBOLEV SPACES. Authors: ILDIKÓ ILONA MEZEI.2. MULTIPLE SOLUTIONS FOR A HOMOGENEOUS SEMILINEAR ELLIPTIC PROBLEM IN DOUBLE WEIGHTED SOBOLEV SPACES. Authors: ILDIKÓ ILONA MEZEI, TÜNDE KOVÁCS.3. MULTIPLE SYMMETRIC SOLUTIONS FOR SOME HEMIVARIATIONAL INEQUALITIES. Authors: ILDIKÓ ILONA MEZEI.4. MULTIPLE SOLUTION FOR A FOURTH-ORDER NONLINEAR EIGENVALUE PROBLEM WITH SINGULAR AND SUBLINEAR POTENTIAL. Authors: CSABA FARKAS, ILDIKÓ ILONA MEZEI, ZSUZSÁNNA-TIMEA NAGY.