></code> is negative,
                <code class="computeroutput"><span class="keyword">false</span></code> otherwise.
              </li>
</ul></div>
</div>
<div class="section">
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<a name="core.cmath.header_boost_core_cmath_hpp.sign_manipulation_functions.template_class_t_bool_copysign_t"></a><a class="link" href="cmath.html#core.cmath.header_boost_core_cmath_hpp.sign_manipulation_functions.template_class_t_bool_copysign_t" title="template&lt;class T&gt; 