dentifier">boost</span><span class="special">::</span><span class="identifier">math</span><span class="special">::</span><span class="identifier">cbrt</span></code> allows use with <span class="emphasis"><em>any
            user-defined floating-point type</em></span>, conveniently <a href="../../../../../../libs/multiprecision/doc/html/index.html" target="_top">Boost.Multiprecision</a>.
            It too can take some advantage of the good-behaviour of the cube function,
            compared to the more g