r]) —
direct outputs from learned diffusion model at current and latter timesteps.


timestep (int) — current and latter discrete timestep in the diffusion chain.


prev_timestep (int) — previous discrete timestep in the diffusion chain.


sample (torch.FloatTensor) —
current instance of sample being created by diffusion process.


Returns

torch.FloatTensor



the sample tensor at the previous timestep.


One step for the second-order singlest