# brackets without a top, what do they mean?

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What does the mathematical symbol that resembles brackets, [ or ], only *without* the line at the top. In other words, they look like a capital L and a reversed capital L. What do they mean? This type of thing is difficult to search on Google.

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Daaark    3553
http://www.barzilai.org/math_sym.htm
http://www.gomath.com/htdocs/ToGoSheet/Algebra/mathsymbols.html

You mean perpendicular symbol?

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They refer to the floor and ceiling functions for real values, if there's no top it's the floor function, if there's no bottom it's the ceiling function.

[Edited by - digitec devil on November 23, 2004 4:17:58 PM]

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HansDampf    106
These symbols mean "floor" and "ceiling" and cap the included expression to the nearest integer value. "Floor" to the next integer, smaller than the expression, "ceiling" to the next largest.

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