  These notes contain part of the lectures of an introductory course on
orthogonal polynomials and special functions that I gave in the joint PhD
Program in Mathematics UC|UP in the academic years 2015-2016 (at University of
Porto) and 2016-2017 (at University of Coimbra). The notes were written for
students who have never contacted with the above topics. Most results presented
here can be found in the available bibliography at the end of each
text/chapter, although in general more detailed proofs have been included (a
few of them different from the ones presented in the source references), hoping
this helps the beginner student.
