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<head><title>BesselJ -- Bessel function of the first kind</title>
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<div><h1>BesselJ -- Bessel function of the first kind</h1>
<div class="single"><h2>Synopsis</h2>
<ul><li><div class="list"><dl class="element"><dt class="heading">Usage: </dt><dd class="value"><div><tt>BesselJ(n,x)</tt><br/><tt>BesselJ_n x</tt></div>
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<li><div class="single">Inputs:<ul><li><span><tt>n</tt>, <span>an <a href="___Z__Z.html">integer</a></span>, the order</span></li>
<li><span><tt>x</tt>, <span>an <a href="___Z__Z.html">integer</a></span>, <span>a <a href="___Q__Q.html">rational number</a></span>, or <span>a <a href="___R__R.html">real number</a></span></span></li>
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<li><div class="single">Outputs:<ul><li><span>the Bessel function of the first kind of order <tt>n</tt> at <tt>x</tt></span></li>
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<div class="single"><h2>Description</h2>
<div><table class="examples"><tr><td><pre>i1 : BesselJ_0 .5
o1 = .938469807240813
o1 : RR (of precision 53)</pre>
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<tr><td><pre>i2 : BesselJ_2 3p200
o2 = .486091260585891076907831094114984034801662265643298727377034
o2 : RR (of precision 200)</pre>
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<p>See <a href="http://en.wikipedia.org/wiki/Bessel_function">http://en.wikipedia.org/wiki/Bessel_function</a>.</p>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="___Bessel__Y.html" title="Bessel function of the second kind">BesselY</a> -- Bessel function of the second kind</span></li>
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<div class="waystouse"><h2>Ways to use <tt>BesselJ</tt> :</h2>
<ul><li>BesselJ(ZZ,QQ)</li>
<li>BesselJ(ZZ,RR)</li>
<li>BesselJ(ZZ,ZZ)</li>
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