  BSML is a pure functional library for the multi-paradigm language OCaml. BSML
embodies the principles of the Bulk Synchronous Parallel (BSP) model, a model
of scalable parallel computing. We propose a formalization of BSML primitives
with WhyML, the specification language of Why3 and specify and prove the
correctness of most of the BSML standard library. Finally, we develop and
verify the correctness of a small BSML application.
