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rbeezer committed 9062206

Solution MO.T13 "1<=i<=n" to "1<=j<=n" (Anna Dovzhik)

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 Typo: Archetype B as homogeneous system fixed, Example HUSAB (Mike Daven)
 Typo: Solution MM.C20, "-2" should be "-3" (Anna Dovzhik)
 Typo: Proof PEEF, second paragraph, insert "product" (Anna Dovzhik)
+Typo: Solution MO.T13 "1<=i<=n" to "1<=j<=n" (Anna Dovzhik)
 
 
 

src/section-MO.xml

 <exercise type="T" number="13" rough="CM">
 <problem contributor="robertbeezer">Prove <acroref type="property" acro="CM" /> of <acroref type="theorem" acro="VSPM" />.  Write your proof in the style of the proof of <acroref type="property" acro="DSAM" /> given in this section.
 </problem>
-<solution contributor="robertbeezer">For all $A,\,B\in M_{mn}$ and for all $1\leq i\leq m$,  $1\leq i\leq n$,
+<solution contributor="robertbeezer">For all $A,\,B\in M_{mn}$ and for all $1\leq i\leq m$,  $1\leq j\leq n$,
 <alignmath>
 \matrixentry{A+B}{ij}
 <![CDATA[&=\matrixentry{A}{ij}+\matrixentry{B}{ij}]]>