Erdős-Turán Conjecture
المؤلف:
Erdős, P. and Turán, P.
المصدر:
"On Some Sequences of Integers." J. London Math. Soc. 11
الجزء والصفحة:
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26-10-2020
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Erdős-Turán Conjecture
Erdős offered a 
prize for a proof of the proposition that "If the sum of reciprocals of a set of integers diverges, then that set contains arbitrarily long arithmetic progressions." This conjecture is still open (unsolved), even for 3-term arithmetic progressions. Erdős also offered 
for an asymptotic formula for 
, the largest possible cardinality of a subset of ![<span style=]()
{1,2,...,n}" src="https://mathworld.wolfram.com/images/equations/Erdos-TuranConjecture/Inline4.gif" style="height:15px; width:69px" /> that does not contain a 3-term arithmetic progression.
REFERENCES:
Erdős, P. and Turán, P. "On Some Sequences of Integers." J. London Math. Soc. 11, 261-264, 1936.
Green, B. and Tao, T. "The Primes Contain Arbitrarily Long Arithmetic Progressions." Preprint. 8 Apr 2004. https://arxiv.org/abs/math.NT/0404188.
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