mathlib3

4093834b - feat(measure_theory/measure/finite_measure_weak_convergence): add definition and lemmas of pairing measures with nonnegative continuous test functions. (#9430)

feat(measure_theory/measure/finite_measure_weak_convergence): add definition and lemmas of pairing measures with nonnegative continuous test functions. (#9430) Add definition and lemmas about pairing of `finite_measure`s and `probability_measure`s with nonnegative continuous test functions. These pairings will be used in the definition of the topology of weak convergence (convergence in distribution): the topology will be defined as an induced topology based on them. Co-authored-by: kkytola <39528102+kkytola@users.noreply.github.com>