Z

The letter Z could refer to:


 * The ring of integers, or its additive group, the group of integers. This is generally denoted $$\mathbb{Z}$$ or $$\mathbf{Z}$$.
 * The center of a group, provided in parentheses, e.g., $$Z(G)$$ is the center of the group $$G$$.
 * The center of a Lie ring, provided in parentheses, e.g., $$Z(L)$$ is the center of the Lie ring $$L$$.