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Computer Security Resource Center

Computer Security Resource Center

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⎾x⏋

Definition(s):

  The ceiling of x; the smallest integer ≥ x. For example,⎾5⏋= 5 and⎾5.2⏋= 6.
Source(s):
NIST SP 800-135 Rev. 1
NIST SP 800-90A Rev. 1

  For a real number x, ⌈x⌉ is the least integer that is not strictly less than x. For example, ⌈3.2⌉ = 4, ⌈−3.2⌉ = −3, and ⌈6⌉=6.
Source(s):
NIST SP 800-185

  The least integer that is not less than the real number x.
Source(s):
NIST SP 800-38B
NIST SP 800-38C
NIST SP 800-38D
NIST SP 800-38F under ⎾x⏋

  The ceiling of x; the smallest integer ³ x. For example, é5ù = 5 and é5.3ù = 6.
Source(s):
NIST SP 800-56B Rev. 2 under ┌x┐

  The ceiling of x; the smallest integer ≥ x. For example,⎾5⏋= 5 and⎾5.3⏋= 6.
Source(s):
NIST SP 800-56A Rev. 2 [Superseded]
NIST SP 800-56B Rev. 1 [Superseded]