cschill2020

Results 2 issues of cschill2020

### What happened? The error2 variable can be greater than 255 for large matrices. When the error2 rolls over the effect breaks and stays static (no more bees/flowers are generated)....

bug
fixed in source

This line: https://github.com/tensorflow/probability/blob/main/tensorflow_probability/python/optimizer/bfgs.py#L210 fails for input of the form: initial_position = [0., tf.zeros(10)] I am working through some simple toy examples and have a JointDistribution of the form: ```python def...