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Code for the paper Analytic-DPM: an Analytic Estimate of the Optimal Reverse Variance in Diffusion Probabilistic Models (ICLR 2022 Outstanding Paper Award)

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Hi, could you give any suggestion on model training? Because I have used the other two code bases to reproduce the results, but both of them failed. [https://github.com/luping-liu/PNDM/issues/6](https://github.com/luping-liu/PNDM/issues/6) Thanks a...

Can Analytic-DPM computes the exact log likelihood for a score model like the way in [score_sde_pytorch](https://github.com/yang-song/score_sde_pytorch/blob/main/likelihood.py)?

code for this model ![9](https://github.com/baofff/Analytic-DPM/assets/97033480/213b690a-8ec2-4063-8c35-594f20abd41a)