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Starting from Rodrigues formula we present a general construction of raisingand lowering operators for orthogonal polynomials of continuous and discretevariable on uniform lattice. In order to have these operators mutually adjointwe introduce orthonormal functions with respect to the scalar product of unitweight. Using the Infeld-Hull factorization method, we generate from theraising and lowering operators the second order self-adjointdifferential/difference operator of hypergeometric type.Comment: LaTeX, 24 pages, iopart style (late submission

Raising and lowering operators, factorization and differential/difference operators of hypergeometric type