Symbols:S

Set

 * $$S$$

Used to denote a general set.

The LaTeX code for $$S$$ is S.

Algebraic Structure

 * $$S$$

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).