Hello.
When looking at the source code of get_lr method in CosineAnnealing,
I wonder why the return value  contains  “(1 + math.cos(math.pi * (self.last_epoch - 1) / self.T_max))” instead of 0.5.

    return [(1 + math.cos(math.pi * self.last_epoch / self.T_max)) /


            (1 + math.cos(math.pi * (self.last_epoch - 1) / self.T_max)) *
            (group['lr'] - self.eta_min) + self.eta_min
            for group in self.optimizer.param_groups]

according to mathematical formula in the docs, when Tcur != (2k+1)Tmax
I think it should be multiplied by 0.5.