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diff --git a/Master/texmf-doc/doc/english/guide-to-latex/exercises/chap7/exer7-6.tex b/Master/texmf-doc/doc/english/guide-to-latex/exercises/chap7/exer7-6.tex deleted file mode 100644 index 2d353a59383..00000000000 --- a/Master/texmf-doc/doc/english/guide-to-latex/exercises/chap7/exer7-6.tex +++ /dev/null @@ -1,11 +0,0 @@ -\documentclass{article} -\begin{document} -The union of two sets $\mathcal{A}$ and $\mathcal{B}$ is the set of elements -that are in at least one of the two sets, and is designated as -$\mathcal{A\cup B}$. This operation is commutative -$\mathcal{A\cup B = B\cup A}$ and associative $\mathcal{(A\cup B)\cup C = -A\cup(B\cup C)}$. If $\mathcal{A\subseteq B}$, then -$\mathcal{A\cup B = B}$. It then follows that $\mathcal{A\cup A = A}$, -$\mathcal{A\cup\{\emptyset\} = A}$ and $\mathcal{J\cup A = J}$. - -\end{document} |