File r37/lisp/csl/html/r37_0160.html artifact c31f7ff5b5 part of check-in 3c4d7b69af

<A NAME=LPOWER>

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



<B>LPOWER</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
<P>
 
 <P>
<P>
The <em>lpower</em> operator returns the leading power of an expression with 
respect to a kernel. 1 is returned if the expression does not depend on 
the kernel. 
 <P> <H3> 
syntax: </H3>
<P>
<P>
<em>lpower</em>(&lt;expression&gt;,&lt;kernel&gt;) 
<P>
<P>
<P>
&lt;expression&gt; is ordinarily a polynomial. If 
<A HREF=r37_0322.html>ratarg</A> is on, 
a rational expression may also be used, otherwise an error results. 
&lt;kernel&gt; must be a 
<A HREF=r37_0002.html>kernel</A>. 
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
lpower((x+2*y)**6,y); 

   6
  Y  


lpower((x + cos(x))**8 + df(x**2,x),cos(x));
			 


        8
  COS(X)  


lpower(x**3 + 3*x,y); 

  1

</TT></PRE><P>