ℤ

See also: Appendix:Variations of "z"

ℤ U+2124, ℤ DOUBLE-STRUCK CAPITAL Z ← ℣ [U+2123] Letterlike Symbols ℥ → [U+2125]

𝐙 U+1D419, 𝐙 MATHEMATICAL BOLD CAPITAL Z ← 𝐘 [U+1D418] Mathematical Alphanumeric Symbols 𝐚 → [U+1D41A]

Translingual

Alternative forms

• 𝐙

Etymology

From 𝐙, from abbreviation of German Zahlen (“numbers”). The usage of blackboard bold dates to the 1960s.

Symbol

ℤ

1. (mathematics) Alternative form of 𝐙, the set of integers
2. (algebra, topology, order theory) The set of integers with some usual structure.