Z

This is a disambiguation page.

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 $L$.