def sh_idx

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/secp256k1/bitsrel.bend:97

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/lib/common.bend as C
import bend-collections-laws-crypto@1.0.0.0/proofs/lib/lemmas/proofs/nat_algebra.bend as NA

97def sh_idx(+j: Nat, +d: Nat, +r: Nat) -> {C.shift(Nat.add(1n+j, d), r) == C.shift(Nat.add(j, 1n+d), r) : Nat}:
98  %Equal.sym(Nat, Nat.add(j, 1n+d), 1n+Nat.add(j, d), NA.add_succ(j, d)) : {C.shift(Nat.add(1n+j, d), r) == C.shift(_, r) : Nat}
99  {==}