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Date: 30-3-2019
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In number theory (e.g., Ivić 2003), the symbol is commonly used to mean the nested logarithm (also called the repeated logarithm or iterated logarithm)
, where
is the natural logarithm.
Care must be taken based on context as to when the notation denotes the logarithm to base
and when it means the
-nested natural logarithm.
The plots above show ,
, and
in the complex plane.
The penchant for formulas and bounds containing a profusion of nested logarithms has led to the following joke. What sound does a drowning analytic number theorist make? A: log log log log... (Havil 2003, p. 115).
REFERENCES:
Canadian Mathematical Society. Student Mathematical Communicator. March 2001. http://www.cms.math.ca/Students/en/Newsletter/March2001/cmsletter/node7.html.
Havil, J. Gamma: Exploring Euler's Constant. Princeton, NJ: Princeton University Press, 2003.
Ivić, A. "On a Problem of Erdős Involving the Largest Prime Factor of ." 5 Nov 2003. http://arxiv.org/abs/math.NT/0311056.
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دراسة: عدم ترتيب الغرفة قد يدل على مشاكل نفسية
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علماء: تغير المناخ تسبب في ارتفاع الحرارة خلال موسم الحج
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برنامج أسبوع الولاية يختتم فعالياته بتخرج الدورات القرآنية التخصصية المستديمة
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