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File:	StrictContent/TheoryOfSets/union/union3
CVS-ID:
Author:	Design Science, Inc. (E. Cannon, E. Tabacman, R.Miner)
Description:	A union empty set eq A
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Source Code:

<math xmlns="http://www.w3.org/1998/Math/MathML">
         <apply>
            <csymbol cd="relation1">eq</csymbol>
            <apply>
               <csymbol cd="set1">union</csymbol>
               <ci>A</ci>
               <ci>φ</ci>
            </apply>
            <ci>A</ci>
         </apply>
      </math>