 Frozen-generator product approximation

ID: frozen-generator-product-approximation

For a partition

s = t_{0} < \dots < t_{N} = t

, the frozen-generator approximation is

U_{N} (t, s) = e^{(t_{N} - t_{N - 1}) A (t_{N - 1})} \dots e^{(t_{1} - t_{0}) A (t_{0})} .

Under the hypotheses of the nonautonomous generation theorem, these products converge strongly and uniformly on compact time triangles to the evolution family.

 New to topics? Read the docs here!