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How to use the larq.math.sign function in larq

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larq / larq / larq / quantizers.py View on Github

def _call(x):
        def grad(dy):
            b_x = beta * x
            return dy * beta * (2 - b_x * tf.tanh(b_x * 0.5)) / (1 + tf.cosh(b_x))

        return math.sign(x), grad