The above instantonic matrix elements are exact only in the deterministic limit. In the general stochastic case, one can consider global supersymmetric states, θ θ 's, from the De Rham cohomology classes of X and observables, γ γ , that are Poincare duals of closed manifolds non-trivial in homology of X . The following matrix elements, ⟨ ⟨ θ θ α α | T ( ∏ ∏ i γ γ ^ ^ i ( t i ) ) | θ θ β β ⟩ ⟩ , are topological invariants representative of the structure of De Rham cohomology ring of X .