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Zero-knowledge proof algorithm Marlin is a R1CS based proof system. Given a coefficient matrix parameter I = (F, n, m, A, B, C) and a set of valid assignments, z = (x, w) ∈ F^n, among which x is public information, namely Instance and is private information, Marlin. In order to reduce the computational complexity for the verifier (see paper 5.2.1(https://eprint.iacr.org/2019/1047))