Four square (disambiguation)
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Four square is a ball game.
Four square may also refer to:
Internet and entertainmentEdit
- Russian four square
- Four-square cipher
- Lagrange's four-square theorem, any natural number equals the sum of four integers squared
- Jacobi's four-square theorem giving the number of distinct ways an integer can be represented as the sum of four squares
- Euler's four-square identity or theorem, the product of two numbers, each of which is a sum of four squares, is itself a sum of four squares.
- Ariel Square Four, a motorcycle
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