"""
Summary:


Copyright (C) 2016, Christoph Gorgulla

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http.//www.gnu.org/licenses/>.


Classes:

"""
import numpy as np

def fermi_function(x):
    #    print "x: ", x
    #    print "f(x) = ", 1./(1+np.exp(x))
    return 1. / (1 + np.exp(x))
