Metamath Proof Explorer
		
		
		
		Description:  Closed walks are walks (in an undirected graph).  (Contributed by Alexander van der Vekens, 25-Aug-2018)  (Revised by AV, 16-Feb-2021)
		
			
				
					|  |  | Ref | Expression | 
				
					|  | Assertion | clwlkswks |  | 
			
		
		
			
				Proof
				
					
						| Step | Hyp | Ref | Expression | 
						
							| 1 |  | clwlkwlk |  | 
						
							| 2 | 1 | ssriv |  |