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Used to denote a general set.

The $\LaTeX$ code for \(S\) is S .

Algebraic Structure


Used to denote a general algebraic structure, in particular a semigroup.

In this context, frequently seen in the compound symbol $\left({S, \circ}\right)$ where $\circ$ represents an arbitrary binary operation.

The $\LaTeX$ code for \(\left({S, \circ}\right)\) is \left({S, \circ}\right) .