  To each natural deformation quantization on a Poisson manifold M we associate
a Poisson morphism from the formal neighborhood of the zero section of the
cotangent bundle to M to the formal neighborhood of the diagonal of the product
M x M~, where M~ is a copy of M with the opposite Poisson structure. We call it
dequantization of the natural deformation quantization. Then we "dequantize"
Fedosov's quantization.
