\log(2 * \pi * \text{target}).
  * **size_average** (*bool**, **optional*) -- Deprecated (see
    "reduction"). By default, the losses are averaged over each
    loss element in the batch. Note that for some losses, there
    multiple elements per sample. If the field "size_average" is
    set to "False", the losses are instead summed for each
    minibatch. Ignored when reduce is "False". Default: "True"

  * **eps** (*float**, **optional*) -- Small value to avoid
    evaluation of \log(0) when "log_input"="False". Default: 1e-8

  * **reduce** (*bool**, **optional*) -- Deprecated (see
    "reduction"). By default, the losses are averaged or summed
    over observations for each minibatch depending on
    "size_average". When "reduce" is "False", returns a loss per
    batch element instead and ignores "size_average". Default:
    "True"

  * **reduction** (*str**, **optional*) -- Specifies the reduction
