J
		
		2022
			
	    
A non-Borel special alpha-limit set in the square
	    JACKSON, Stephen; Bill MANCE and Samuel Joshua ROTH
	
	
	
	    
	
     
 
	
	Basic information
	
		Original name
		A non-Borel special alpha-limit set in the square
	 
				Authors
				JACKSON, Stephen (840 United States of America, guarantor); Bill MANCE (840 United States of America) and Samuel Joshua ROTH (840 United States of America, belonging to the institution)
			 
			
				Edition
				 Ergodic Theory and Dynamical Systems, New York, Cambridge University Press, 2022, 0143-3857
			 
		
Other information
		
	
		
			Type of outcome
			Article in a journal
		 
	
		
			Field of Study
			10101 Pure mathematics
		 
	
		
			Country of publisher
			United States of America
		 
	
		
			Confidentiality degree
			is not subject to a state or trade secret
		 
	
			
		
			
				Impact factor
				Impact factor: 0.900
			 
		
		
			RIV identification code
			RIV/47813059:19610/22:A0000119
		 
	
			
				Organization unit
				Mathematical Institute in Opava
			 
		
			
		
		
			EID Scopus
			2-s2.0-85111071309
		 
		
			Keywords in English
			special alpha limit set; triangular map of the square; non-Borel analytic set
		 
			Tags
			International impact, Reviewed
		 
			
			
				
					In the original language
					We consider the complexity of special alpha-limit sets, a kind of backward limit set for non-invertible dynamical systems. We show that these sets are always analytic, but not necessarily Borel, even in the case of a surjective map on the unit square. This answers a question posed by Kolyada, Misiurewicz, and Snoha.
				  
				Displayed: 31/10/2025 22:37