Symbols:C

Hexadecimal
$$\mathrm{C}$$ or $$\mathrm{c}$$

The hexadecimal digit $$12$$.

Its LaTeX code is \mathrm{C} or \mathrm{c}.

The Set of Complex Numbers
$$\C$$

The set of complex numbers.

Its LaTeX code is \mathbb{C} or \C.

The Set of Non-Zero Complex Numbers
$$\C^*$$

The set of non-zero complex numbers:
 * $$\C^* = \C - \left\{{0}\right\}$$.

Its LaTeX code is \mathbb{C}^* or \C^*.