Associative
Let \(A\) be a set . We call a binary operation \(\ast: A \times A \rightarrow A\) associative if for every \(a,b,c \in A\):
\[ (a \ast b) \ast c = a \ast (b \ast c) \]Let \(A\) be a set . We call a binary operation \(\ast: A \times A \rightarrow A\) associative if for every \(a,b,c \in A\):
\[ (a \ast b) \ast c = a \ast (b \ast c) \]