Metamath Proof Explorer
		
		
		
		Description:  Define the subset class.  For the value, see brsset .  (Contributed by Scott Fenton, 31-Mar-2012)
		
			
				
					|  |  | Ref | Expression | 
				
					|  | Assertion | df-sset |  | 
			
		
		
			
				Detailed syntax breakdown
				
					
						| Step | Hyp | Ref | Expression | 
						
							| 0 |  | csset |  | 
						
							| 1 |  | cvv |  | 
						
							| 2 | 1 1 | cxp |  | 
						
							| 3 |  | cep |  | 
						
							| 4 | 1 3 | cdif |  | 
						
							| 5 | 3 4 | ctxp |  | 
						
							| 6 | 5 | crn |  | 
						
							| 7 | 2 6 | cdif |  | 
						
							| 8 | 0 7 | wceq |  |