Fourier series in orthogonal polynomials with respect to a measure Μ on
[â1,1] are studied when Îœ is a linear combination of a generalized Jacobi
weight and finitely many Dirac deltas in [â1,1]. We prove some weighted norm
inequalities for the partial sum operators Snâ, their maximal operator Sâ
and the commutator [Mbâ,Snâ], where Mbâ denotes the operator of pointwise
multiplication by b \in \BMO. We also prove some norm inequalities for Snâ
when Μ is a sum of a Laguerre weight on R+ and a positive mass on 0