It is defined as: swish(x) = x * sigmoid(x)
.
The Swish (or Silu) activation function is a smooth, non-monotonic function that is unbounded above and bounded below.
See also
Other activations: activation_elu()
activation_exponential()
activation_gelu()
activation_hard_sigmoid()
activation_leaky_relu()
activation_linear()
activation_log_softmax()
activation_mish()
activation_relu()
activation_relu6()
activation_selu()
activation_sigmoid()
activation_softmax()
activation_softplus()
activation_softsign()
activation_tanh()