J
		
		2023
			
	    
A Note on the Krylov Solvability of Compact Normal Operators on Hilbert Space
	    CARUSO, Noe Angelo
	
	
	
	    
	
     
 
	
	Basic information
	
		Original name
		A Note on the Krylov Solvability of Compact Normal Operators on Hilbert Space
	 
				Authors
				CARUSO, Noe Angelo (36 Australia, guarantor, belonging to the institution)
			 
			
				Edition
				 Complex Analysis and Operator Theory, Basel, Switzerland, Springer Basel AG, 2023, 1661-8254
			 
		
Other information
		
	
		
			Type of outcome
			Article in a journal
		 
	
		
			Field of Study
			10101 Pure mathematics
		 
	
		
			Country of publisher
			Switzerland
		 
	
		
			Confidentiality degree
			is not subject to a state or trade secret
		 
	
			
		
			
				Impact factor
				Impact factor: 0.700
			 
		
		
			RIV identification code
			RIV/47813059:19610/23:A0000145
		 
	
			
				Organization unit
				Mathematical Institute in Opava
			 
		
			
		
		
			EID Scopus
			2-s2.0-85171555783
		 
		
			Keywords in English
			Bounded linear operators; Compact operators; Cyclic operators; Ill-posed problems; Infinite-dimensional Hilbert space; Inverse linear problems; Krylov solution; Krylov solvability; Krylov subspaces; Normal operators
		 
			Tags
			International impact, Reviewed
		 
			
			
				
					In the original language
					We analyse the Krylov solvability of inverse linear problems on Hilbert space H where the underlying operator is compact and normal. Krylov solvability is an important feature of inverse linear problems that has profound implications in theoretical and applied numerical analysis as it is critical to understand the utility of Krylov based methods for solving inverse problems. Our results explicitly describe for the first time the Krylov subspace for such operators given any datum vector g is an element of H, as well as prove that all inverse linear problems are Krylov solvable provided that g is in the range of such an operator. We therefore expand our knowledge of the class of Krylov solvable operators to include the normal compact operators. We close the study by proving an isomorphism between the closed Krylov subspace for a general bounded normal operator and an L-2-measure space based on the scalar spectral measure.
				  
				Displayed: 31/10/2025 16:45