<?xml version="1.0"?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN""http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd"><html xmlns="http://www.w3.org/1999/xhtml">  <head>    <title>ara-5.xml</title>     </head><body><p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mi>c</mi> <mo>=</mo>
 <msub>
<mo> H </mo> <mo> <mi>i</mi><mi>j</mi> <mo/>
</msub> <mover accent="false"> <mo> <mi>b</mi> </mo> <mo> &RightArrow; </mo> </mover>  
<!-- ]|Expr|[#b @`b___})'# b$L" *~: ;bP9&c55*c ,] $^H(!ij}_;bP8 <c$%!|
|^;bP9b}}& b!( b"0 b#8 b$@ b%H b&P!WW}]|[ -->
</math>
</p></body></html>