def eta
import bendtorch-core@0.1.0.0/src/tensor/matmul_parallel_proof.bend as MatmulParallelProofimport Base
184def eta(-X: Type, -Y: Type, pair: X & Y) -> {pair == (Pair.fst(X, Y, pair), Pair.snd(X, Y, pair)) : X & Y}:
185 (x, y) = pair
186 {==}