U+1D56B "𝕫" Mathematical Double-Struck Small Z Unicode Character

U+1D56B "𝕫" Mathematical Double-Struck Small Z is a typographic glyph used primarily in mathematical notation, where double-struck letters (also called blackboard bold) conventionally represent sets of numbers, such as the integers with mathbb{Z}. Unlike its uppercase counterpart, which is widely known for denoting the set of all integers, this lowercase version appears less frequently but is sometimes employed in advanced mathematics or logic to represent specific subsets or algebraic structures, such as the set of Gaussian integers or in number theory contexts. It belongs to the Mathematical Alphanumeric Symbols block in Unicode, designed to provide distinct letter forms for mathematical texts to avoid ambiguity with ordinary alphabetic characters.