nction" href="namespacenc.html#a8e78c416b2386411d8c6b5226bd4c78a">dtype2</a>);</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span> </div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span><span class="preprocessor">#ifdef __cpp_lib_math_special_functions</span></div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>        <span class="keywordflow">return</span> std::cyl_bessel_k(<span class="keyword"