Artifact 503e47c2bc56269159e363824449e090da8f7224664d3cf70e919d10a8a11260:

• Executable file r37/lisp/csl/html/r37_0028.html — part of check-in [f2fda60abd] at 2011-09-02 18:13:33 on branch master — Some historical releases purely for archival purposes

  git-svn-id: https://svn.code.sf.net/p/reduce-algebra/code/trunk/historical@1375 2bfe0521-f11c-4a00-b80e-6202646ff360 (user: arthurcnorman@users.sourceforge.net, size: 1013) [annotate] [blame] [check-ins using] [more...]

<A NAME=minussign>

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



<B>-</B> _ _ _ <B>MINUSSIGN</B> _ _ _  _ _ _  _ _ _  _ _ _ <B>operator</B><P>
<P>
 
The <em>-</em> operator is a prefix or infix binary subtraction operator, as wel
l 
as the unary minus operator. 
<P>
<P>
 <P> <H3> 
syntax: </H3>
&lt;expression&gt; <em>-</em> &lt;expression&gt; 
or <em>-</em>(&lt;expression&gt;,&lt;expression&gt;) 
<P>
<P>
<P>
&lt;expression&gt; may be any valid REDUCE expression. 
<P>
<P>
 <P> <H3> 
examples: </H3>
<P><PRE><TT>
15 - 4; 

  11 


x*(-5); 

  - 5*X 


a - b - 15; 

  A - B - 15 


-(a,4); 

  A - 4

</TT></PRE><P>The subtraction operator is left associative, so that a - b - c is
 equivalent 
to (a - b) - c, as shown in the third example. The subtraction operator is 
also valid with 
<A HREF=r37_0345.html>matrix</A> expressions of the correct dimensions 
and with 
<A HREF=r37_0045.html>equation</A>s. 
<P>
<P>
<P>