SquareSubset
 Usage
 \[SquareSubset]
Notes
• Infix set relation operator. • x  y is by default interpreted as SquareSubset[x, y]. • Used in computer science to indicate that x is a substring occurring at the beginning of y. • See Section 3.10.4. • See also: \[NotSquareSubset] , \[SquareSuperset] .
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