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Hard shrink function.

Computes hard shrink function:

$$ \mathrm{hardshrink}(x) = \begin{cases} x & \text{if } x < \text{lower} \\ x & \text{if } x > \text{upper} \\ 0 & \text{otherwise} \end{cases}. $$


x = tf.constant([1.0, 0.0, 1.0])
<tf.Tensor: shape=(3,), dtype=float32, numpy=array([1., 0., 1.], dtype=float32)>

x A Tensor. Must be one of the following types: float16, float32, float64.
lower float, lower bound for setting values to zeros.
upper float, upper bound for setting values to zeros.

A Tensor. Has the same type as x.