| Step | Hyp | Ref | Expression | 
						
							| 1 |  | rnghomval.1 |  | 
						
							| 2 |  | rnghomval.2 |  | 
						
							| 3 |  | rnghomval.3 |  | 
						
							| 4 |  | rnghomval.4 |  | 
						
							| 5 |  | rnghomval.5 |  | 
						
							| 6 |  | rnghomval.6 |  | 
						
							| 7 |  | rnghomval.7 |  | 
						
							| 8 |  | rnghomval.8 |  | 
						
							| 9 | 1 2 3 4 5 6 7 8 | rngohomval |  | 
						
							| 10 | 9 | eleq2d |  | 
						
							| 11 | 5 | fvexi |  | 
						
							| 12 | 11 | rnex |  | 
						
							| 13 | 7 12 | eqeltri |  | 
						
							| 14 | 1 | fvexi |  | 
						
							| 15 | 14 | rnex |  | 
						
							| 16 | 3 15 | eqeltri |  | 
						
							| 17 | 13 16 | elmap |  | 
						
							| 18 | 17 | anbi1i |  | 
						
							| 19 |  | fveq1 |  | 
						
							| 20 | 19 | eqeq1d |  | 
						
							| 21 |  | fveq1 |  | 
						
							| 22 |  | fveq1 |  | 
						
							| 23 |  | fveq1 |  | 
						
							| 24 | 22 23 | oveq12d |  | 
						
							| 25 | 21 24 | eqeq12d |  | 
						
							| 26 |  | fveq1 |  | 
						
							| 27 | 22 23 | oveq12d |  | 
						
							| 28 | 26 27 | eqeq12d |  | 
						
							| 29 | 25 28 | anbi12d |  | 
						
							| 30 | 29 | 2ralbidv |  | 
						
							| 31 | 20 30 | anbi12d |  | 
						
							| 32 | 31 | elrab |  | 
						
							| 33 |  | 3anass |  | 
						
							| 34 | 18 32 33 | 3bitr4i |  | 
						
							| 35 | 10 34 | bitrdi |  |