Zeros of Jacobi-Sobolev orthogonal polynomials

10 pages, no figures.-- MSC2000 codes: 33C45.MR#: MR2027148 (2004m:33017)Zbl#: Zbl pre05376428We investigate zeros of Jacobi-Sobolev orthogonal polynomials with respect to $$\multline \langle f, g\rangle = \int_{-1}^1 f(x)g(x)(1-x)^{ \alpha }(1+x)^{\beta} dx\\ +\gamma \int_{-1}^1 f'(x)g'(x)(1-x)^{ \alpha +1}(1+x)^{ \beta } dx,\endmultline $$ where $\alpha >-1,\ -1 < \beta \le 0,\ \gamma >0$.KHK and GJY were partially supported by KOSEF (98-0701-03-01-5) and Hwarangdae Research Institute. FM was partially supported by Dirección General de Investigación (MCYT) of Spain under grant BFM2000-0206-C04-01 and INTAS00-272.Publicad