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  • 2.3: Open Sentences and Sets
    https://math.libretexts.org/Courses/SUNY_Schenectady_County_Community_College/Discrete_Structures/02%3A_Logical_Reasoning/2.03%3A_Open_Sentences_and_Sets
    If \(A\)is a set and \(y\) is one of the objects in the set \(A\), we write \(y \in A\) and read this as “\(y\) is an element of \(A\)” or “\(y\) is a member of \(A\).” For example, if \(B\) is the se...If \(A\)is a set and \(y\) is one of the objects in the set \(A\), we write \(y \in A\) and read this as “\(y\) is an element of \(A\)” or “\(y\) is a member of \(A\).” For example, if \(B\) is the set of all integers greater than 4, then we could write \(5 \in B\) and \(10 \in B\).
  • 2.3: Open Sentences and Sets
    https://math.libretexts.org/Bookshelves/Mathematical_Logic_and_Proof/Book%3A_Mathematical_Reasoning__Writing_and_Proof_(Sundstrom)/02%3A_Logical_Reasoning/2.03%3A_Open_Sentences_and_Sets
    If \(A\)is a set and \(y\) is one of the objects in the set \(A\), we write \(y \in A\) and read this as “\(y\) is an element of \(A\)” or “\(y\) is a member of \(A\).” For example, if \(B\) is the se...If \(A\)is a set and \(y\) is one of the objects in the set \(A\), we write \(y \in A\) and read this as “\(y\) is an element of \(A\)” or “\(y\) is a member of \(A\).” For example, if \(B\) is the set of all integers greater than 4, then we could write \(5 \in B\) and \(10 \in B\).

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