| Step | Hyp | Ref | Expression | 
						
							| 1 |  | hdmapval.h |  | 
						
							| 2 |  | elex |  | 
						
							| 3 |  | fveq2 |  | 
						
							| 4 | 3 1 | eqtr4di |  | 
						
							| 5 |  | fveq2 |  | 
						
							| 6 | 5 | reseq2d |  | 
						
							| 7 |  | fveq2 |  | 
						
							| 8 | 7 | fveq1d |  | 
						
							| 9 | 8 | reseq2d |  | 
						
							| 10 | 6 9 | opeq12d |  | 
						
							| 11 |  | fveq2 |  | 
						
							| 12 | 11 | fveq1d |  | 
						
							| 13 |  | fveq2 |  | 
						
							| 14 | 13 | fveq1d |  | 
						
							| 15 |  | fveq2 |  | 
						
							| 16 | 15 | fveq1d |  | 
						
							| 17 | 16 | fveq2d |  | 
						
							| 18 |  | fveq2 |  | 
						
							| 19 | 18 | fveq1d |  | 
						
							| 20 | 19 | fveq1d |  | 
						
							| 21 | 20 | oteq2d |  | 
						
							| 22 | 21 | fveq2d |  | 
						
							| 23 | 22 | oteq2d |  | 
						
							| 24 | 23 | fveq2d |  | 
						
							| 25 | 24 | eqeq2d |  | 
						
							| 26 | 25 | imbi2d |  | 
						
							| 27 | 26 | ralbidv |  | 
						
							| 28 | 17 27 | riotaeqbidv |  | 
						
							| 29 | 28 | mpteq2dv |  | 
						
							| 30 | 29 | eleq2d |  | 
						
							| 31 | 14 30 | sbceqbid |  | 
						
							| 32 | 31 | sbcbidv |  | 
						
							| 33 | 12 32 | sbceqbid |  | 
						
							| 34 | 10 33 | sbceqbid |  | 
						
							| 35 | 34 | abbidv |  | 
						
							| 36 | 4 35 | mpteq12dv |  | 
						
							| 37 |  | df-hdmap |  | 
						
							| 38 | 36 37 1 | mptfvmpt |  | 
						
							| 39 | 2 38 | syl |  |