<?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-1.xml</title>     </head><body><p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<msub>
<mo> <mi>b</mi> </mo> <mo> <mn>1</mn> <mo/>
</msub> <mo>=</mo>
 <mi>a</mi> 
<!-- ]|Expr|[#b @`bb#_b#_b#_})%# b$L$^" *~: ;bP9&c55*b^1_ ,] a|
|}& b!( b"0 b#8 b$@ b%H b&P!WW}]|[ -->
</math>
</p></body></html>