Incidences with Pfaffian Curves and Functions

We introduce a new approach for studying incidences with non-algebraic curves in the plane. This approach is based on the concepts of Pfaffian curves and Pfaffian functions, as defined by Khovanskii. We derive incidence bounds for curves that are defined with exponentials, logarithms, trigonometric functions, integration, and more. Our bound for incidences with Pfaffian curves matches a classical bound of Pach and Sharir for incidences with algebraic curves, up to polylogarithmic factors.