Sets - Relative Complement
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Complement (Relative), denoted \( \backslash\), refers to the elements in the first set, but are not in the second set.
In symbols, for set \(A\) and \(B\), \(A \backslash B = \{ x | x \in A \wedge x \notin B\}\)
Venn Diagram Sets
In the example, \( H\backslash T = \{ c, f \} \).