Batchnorm as a single parameter

[JordyDH]

Hi,
https://www.reddit.com/r/MachineLearning/comments/450a4p/160202830_binarynet_training_deep_neural_networks/czut3dp/
In this reddit post you suggest you can calculate the bn parameter as a threshold.
T = mean + β (std + e) / γ
My question:

1. Theano trains inv_std so do i need to do 1.0/inv_std to become std
2. the "e" value is it the eulers value of : 2.71828

[MatthieuCourbariaux]

1. I do not remember.
2. e is a small number to prevent instability... maybe 10^-6. I do not remember.