Erdős-Turán Conjecture					
				 
				
					
						
						 المؤلف:  
						Erdős, P. and Turán, P.					
					
						
						 المصدر:  
						"On Some Sequences of Integers." J. London Math. Soc. 11					
					
						
						 الجزء والصفحة:  
						...					
					
					
						
						23-10-2019
					
					
						
						916					
				 
				
				
				
				
				
				
				
				
				
			 
			
			
				
				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 
{1,2,...,n}" src="http://mathworld.wolfram.com/images/equations/Erdos-TuranConjecture/Inline4.gif" style="height:14px; 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. http://arxiv.org/abs/math.NT/0404188.
				
				
					
					
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