| Step | Hyp | Ref | Expression | 
						
							| 1 |  | idlsrgtset.1 |  | 
						
							| 2 |  | idlsrgtset.2 |  | 
						
							| 3 |  | idlsrgtset.3 |  | 
						
							| 4 | 2 | fvexi |  | 
						
							| 5 | 4 | mptex |  | 
						
							| 6 | 5 | rnex |  | 
						
							| 7 |  | eqid |  | 
						
							| 8 | 7 | idlsrgstr |  | 
						
							| 9 |  | tsetid |  | 
						
							| 10 |  | snsspr1 |  | 
						
							| 11 |  | ssun2 |  | 
						
							| 12 | 10 11 | sstri |  | 
						
							| 13 | 8 9 12 | strfv |  | 
						
							| 14 | 6 13 | ax-mp |  | 
						
							| 15 |  | eqid |  | 
						
							| 16 |  | eqid |  | 
						
							| 17 |  | eqid |  | 
						
							| 18 | 2 15 16 17 | idlsrgval |  | 
						
							| 19 | 1 18 | eqtrid |  | 
						
							| 20 | 19 | fveq2d |  | 
						
							| 21 | 14 20 | eqtr4id |  | 
						
							| 22 | 3 21 | eqtrid |  |