x and real n. <span class="math display">\[ \mathrm{log\_rising\_factorial}(x,n) =
\begin{cases} \log x^{(n)} &amp; \text{if } x &gt; 0 \\ \textrm{error} &amp;
\text{if } x \leq 0 \end{cases} \]</span></p>
</div>
            </section>

          </div>
        </div>
      </div>
<a href="Phi-function.html" class="navigation navigation-prev " aria-label="Previous page"><i class="fa fa-angle-left"></i></a>
<a href="composed-functions.html" class="navigation navigation-next " aria-label="Next page"><i class