zero knowledge is just the first layer of a bigger theme called secure multi-party computation where there are several parties that each one of them has you know some private information and they wish to jointly compute some function. Recursion so the moment you have any succinct proof system where a checking a computation takes less time than running it you can do recursively invoke the proof system on itself. We understand how this works for Snarks also in practice together with Ailey and other great colleagues Rantromer and Madras Wilsa we demonstrate it for the first time practical recursion of Snarks. The prover node will not be open source at first but we will plan to blow our intentions