Solved by KFrank in post #2 
              
              
                Hi Dan! 

This is a documentation bug.  Quoting from pytorch’s 1.8.1 documentation: 
eps     float     The smallest representable number
                  such that 1.0 + eps != 1.0.

This is sort of on the right track, but really isn’t correct. 
Numpy’s (1.20) documentation gets it right: 
eps : fl…