Square
 Usage
 \[Square]
Notes
• Alias:  sq. • Prefix operator. •  x is by default interpreted as Square[x]. • Used in mathematical physics to denote the d'Alembertian operator. • Sometimes used in number theory to indicate a quadratic residue. • Not the same as \[EmptySquare] . • See Section 3.10.4. • See also: \[Del] .
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