Marcellán, Francisco [UNESP]Rafaeli, Fernando R. [UNESP]2014-05-272014-05-272011-11-01Proceedings of the American Mathematical Society, v. 139, n. 11, p. 3929-3936, 2011.0002-9939http://hdl.handle.net/11449/72771In this paper we analyze the location of the zeros of polynomials orthogonal with respect to the inner product where α >-1, N ≥ 0, and j ∈ N. In particular, we focus our attention on their interlacing properties with respect to the zeros of Laguerre polynomials as well as on the monotonicity of each individual zero in terms of the mass N. Finally, we give necessary and sufficient conditions in terms of N in order for the least zero of any Laguerre-Sobolev-type orthogonal polynomial to be negative. © 2011 American Mathematical Society.3929-3936engAsymptoticsInterlacingLaguerre orthogonal polynomialsLaguerre-Sobolev-type orthogonal polynomialsMonotonicityZerosArtigo10.1090/S0002-9939-2011-10806-2Acesso aberto2-s2.0-799607922192-s2.0-79960792219.pdf