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File:	Content/TheoryOfSets/prsubset/rec-prsubset1
CVS-ID:
Author:	MathML 2 Recommendation
Description:	A is proper subset of B as <apply>
passed (p) failed (f) not-tested (n) broken-test (b) some parts pass (s)
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Source Code:

    <math xmlns="http://www.w3.org/1998/Math/MathML"> 
      <apply> 
        <prsubset/> 
        <ci> A </ci> 
        <ci> B </ci> 
      </apply> 
    </math>