exponential of the elements minus 1
of :attr:`input`.

.. math::
    y_{i} = e^{x_{i}} - 1

.. note:: This function provides greater precision than exp(x) - 1 for small values of x.

zŒ
Args:
    {input}

Keyword args:
    {out}

Example::

    >>> torch.special.expm1(torch.tensor([0, math.log(2.)]))
    tensor([ 0.,  1.])
a