def precompute_gbt_A(self, delta, alpha=0.5):
        """Return the A matrix of the gbt discretization."""
        c = self.precompute_forward((1.-alpha)*delta)
        d = self.precompute_backward(alpha*delta)
        return causal_convolution(c, d)
Return the A matrix of the gbt discretization.
analyze/convnexts4nd/src/models/hippo/transition.py