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The base 2 logarithm of the positive real number x.
NIST SP 800-38B
NIST SP 800-38C
Comments about specific definitions should be sent to the authors of the linked Source publication. For NIST publications, an email is usually found within the document.
Comments about the glossary's presentation and functionality should be sent to firstname.lastname@example.org.
See NISTIR 7298 Rev. 3 for additional details.