GELU

class torch.nn.GELU(approximate='none')

Applies the Gaussian Error Linear Units function.

\[\text{GELU}(x) = x * \Phi(x) \]

where \(\Phi(x)\) is the Cumulative Distribution Function for Gaussian Distribution.

When the approximate argument is ‘tanh’, Gelu is estimated with:

\[\text{GELU}(x) = 0.5 * x * (1 + \text{Tanh}(\sqrt{2 / \pi} * (x + 0.044715 * x^3))) \]

Parameters:

approximate (str, optional) – the gelu approximation algorithm to use: 'none' | 'tanh'. Default: 'none'

Shape:

• Input: \((*)\), where \(*\) means any number of dimensions.

• Output: \((*)\), same shape as the input.

Examples:

>>> m = nn.GELU()
>>> input = torch.randn(2)
>>> output = m(input)