ower bound on output values.
Implicitly zero if <code>NULL</code>. Otherwise, the
transformation <code>y = softplus(x) + low</code> is implemented. This
is equivalent to a <code><a href='tfb_chain.html'>tfb_chain(list(tfb_shift(low), tfb_softplus()))</a></code> bijector
and is provided for convenience.</p></td>
    </tr>
    <tr>
      <th>validate_args</th>
      <td><p>Logical, default FALSE. Whether to validate input with asserts. If validate_args is
FALSE, and the inputs are invalid, correct behavior is