# Hard SiLU activation function, also known as Hard Swish.

Source:`R/activations.R`

`activation_hard_silu.Rd`

It is defined as:

`0`

if`if x < -3`

`x`

if`x > 3`

`x * (x + 3) / 6`

if`-3 <= x <= 3`

It's a faster, piecewise linear approximation of the silu activation.