U+29C8 "⧈" Squared Square Unicode Character

U+29C8 "⧈" Squared Square is a mathematical symbol that represents a square enclosed within another square, often used in geometry or set theory to denote a specific operation or relationship such as a square product or a tiling pattern. It belongs to the Miscellaneous Mathematical Symbols-B block, which contains various notation for advanced mathematics and physics. Visually, the character consists of an outer square with a smaller, concentric inner square, creating a frame-like appearance. While not commonly found in everyday text, it serves as a precise notation in specialized academic contexts, particularly for representing the Cartesian product of a graph with itself or as a placeholder in formal logic systems.