PyTorch1.4.0
1. Put optim/stbfgs.py, optim/rstbfgs.py to the optim directory of PyTorch
2. Modify __init__.py by adding

from .stbfgs import STBFGS
del stbfgs

from .rstbfgs import RSTBFGS
del rstbfgs

3. Three random seeds are 1, 65537, 6700417.
4. See the readme.txt in each sub-directory for running an example.

