Processing math: 100%
Skip to yearly menu bar Skip to main content


Poster

Score matching for bridges without learning time-reversals

Simon Olsson · Gefan Yang


Abstract: We propose a new algorithm for learning a bridged diffusion process using score-matching methods. Our method relies on reversing the dynamics of the forward process and using this to learn a score function, which, via Doob's h-transform, gives us a bridged diffusion process; that is, a process conditioned on an endpoint. In contrast to prior methods, ours learns the score term xlogp(t,x;T,y), for given t,y directly, completely avoiding the need for first learning a time-reversal. We compare the performance of our algorithm with existing methods and see that it outperforms using the (learned) time-reversals to learn the score term. The code can be found at https://github.com/libbylbaker/forward_bridge.

Live content is unavailable. Log in and register to view live content