Weighted norm inequalities for integral transforms with splitting kernels

We obtain necessary and sufficient conditions on weights for a wide class of integral transforms to be bounded between weighted Lᵖ-Lq spaces, with 1≤ p≤ q≤ ∞. The kernels $K(x,y)$ of such transforms are only assumed to satisfy upper bounds given by products of two functions, one in each variable. The obtained results are applicable to a number of transforms, some of which are included here as particular examples. Some of the new results derived here are the characterization of weights for the boundedness of the H_α (or Struve) transform in the case α>1/2, or the characterization of power weights for which the Laplace transform is bounded in the limiting cases $p=1$ or q=∞.