| Step | Hyp | Ref | Expression | 
						
							| 1 |  | cnvopab |  | 
						
							| 2 |  | 3ancoma |  | 
						
							| 3 |  | ffvelcdm |  | 
						
							| 4 |  | ax-his1 |  | 
						
							| 5 | 3 4 | sylan |  | 
						
							| 6 | 5 | adantrl |  | 
						
							| 7 |  | ffvelcdm |  | 
						
							| 8 |  | ax-his1 |  | 
						
							| 9 | 7 8 | sylan2 |  | 
						
							| 10 | 9 | adantll |  | 
						
							| 11 | 6 10 | eqeq12d |  | 
						
							| 12 | 11 | ancoms |  | 
						
							| 13 |  | hicl |  | 
						
							| 14 | 3 13 | sylan2 |  | 
						
							| 15 | 14 | adantll |  | 
						
							| 16 |  | hicl |  | 
						
							| 17 | 7 16 | sylan |  | 
						
							| 18 | 17 | adantrl |  | 
						
							| 19 |  | cj11 |  | 
						
							| 20 | 15 18 19 | syl2anc |  | 
						
							| 21 | 12 20 | bitr2d |  | 
						
							| 22 | 21 | an4s |  | 
						
							| 23 | 22 | anassrs |  | 
						
							| 24 |  | eqcom |  | 
						
							| 25 | 23 24 | bitrdi |  | 
						
							| 26 | 25 | ralbidva |  | 
						
							| 27 | 26 | ralbidva |  | 
						
							| 28 |  | ralcom |  | 
						
							| 29 | 27 28 | bitrdi |  | 
						
							| 30 | 29 | pm5.32i |  | 
						
							| 31 |  | df-3an |  | 
						
							| 32 |  | df-3an |  | 
						
							| 33 | 30 31 32 | 3bitr4i |  | 
						
							| 34 | 2 33 | bitri |  | 
						
							| 35 | 34 | opabbii |  | 
						
							| 36 | 1 35 | eqtri |  | 
						
							| 37 |  | dfadj2 |  | 
						
							| 38 | 37 | cnveqi |  | 
						
							| 39 |  | dfadj2 |  | 
						
							| 40 | 36 38 39 | 3eqtr4i |  |