the pdf of Y_i is the convolution of
the pdf of k independent Laplace random variables.  One can then show by
induction that distributions with exponential (up to polynomial factors) tails
are closed under convolution.</p>
    <h2 class="hasAnchor" id="see-also"><a class="anchor" href="#see-also"></a>See also</h2>

    <div class='dont-index'><p>For usage examples see e.g. <code><a href='tfd_sample.html'>tfd_sample()</a></code>, <code><a href='tfd_log_prob.html'>tfd_log_prob()</a></code>, <code><a href='tfd