File r37/lisp/csl/html/r37_0513.html artifact fd1af58472 part of check-in 3c4d7b69af



<A NAME=Chi>

<TITLE>Chi</TITLE></A>
<b><a href=r37_idx.html>INDEX</a></b><p><p>



<B>CHI</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
<P>
 
 <P>
<P>
The <em>Chi</em> operator returns the Hyperbolic Cosine Integral function. 
<P>
<P>
 <P> <H3> 
syntax: </H3>
<em>Chi</em>(&lt;expression&gt;) 
<P>
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
defint((cosh(t)-1)/t,t,0,x); 

  - log(x) + psi(1) + chi(x)


on rounded; 

Chi(0.35); 

  - 0.44182471827

</TT></PRE><P>The numeric values for the operator <em>Chi</em> are computed via 
the 
power series representation, which limits the argument range. 
<P>
<P>
<P>


REDUCE Historical
REDUCE Sourceforge Project | Historical SVN Repository | GitHub Mirror | SourceHut Mirror | NotABug Mirror | Chisel Mirror | Chisel RSS ]