calculation of sqrt_recipm1_alphas_bar

[vox-1]

Hi,
Whether this is a bug or not is on line 55 of diffusion.py: self.sqrt_recipm1_alphas_bar = torch.exp(self.log_one_minus_alphas_bar - self.log_sqrt_alphas_bar)？
When I read this code, I found that the calculation of sqrt_recipm1_alphas_bar should use log_sqrt_one_minus_alphas_bar instead of log_one_minus_alphas_bar, and this code is missing sqrt part.

[vox-1]

In line 84 of dissusion.py : var = self._extract(1.0 - self.sqrt_alphas_bar, t, x_0.shape), should it be changed to 1.0 - self.alphas_bar?

[vox-1]

In line 84 of dissusion.py : self._extract(coef = self.sqrt_one_minus_alphas_bar, t = t, x_shape = x_t.shape) * eps should it be changed to self.sqrt_recipm1_alphas_bar