Rebocho, Maria das NevesCastillo, KenierMarcellan, Francisco2020-02-062020-02-062016K. Castillo, F. Marcell an, and M.N. Rebocho, Zeros of para-orthogonal polynomials and linear spectral transformations on the unit circle, Numerical Algorithms 71 no.3 (2016) 699-714http://hdl.handle.net/10400.6/9060We study the interlacing properties of zeros of para–orthogonal polynomials associated with a nontrivial probability measure supported on the unit circle dμ and para–orthogonal polynomials associated with a modification of dμ by the addition of a pure mass point, also called Uvarov transformation. Moreover, as a direct consequence of our approach, we present some results related with the Christoffel transformation.engPara-orthogonal polynomialsInterlacing of zerosUvarov transformationChristoffel transformationjournal article