| Step | Hyp | Ref | Expression | 
						
							| 1 |  | aks6d1c7.1 |  | 
						
							| 2 |  | aks6d1c7.2 |  | 
						
							| 3 |  | aks6d1c7.3 |  | 
						
							| 4 |  | aks6d1c7.4 |  | 
						
							| 5 |  | aks6d1c7.5 |  | 
						
							| 6 |  | aks6d1c7.6 |  | 
						
							| 7 |  | aks6d1c7.7 |  | 
						
							| 8 |  | aks6d1c7.8 |  | 
						
							| 9 |  | aks6d1c7.9 |  | 
						
							| 10 |  | aks6d1c7.10 |  | 
						
							| 11 |  | aks6d1c7.11 |  | 
						
							| 12 |  | aks6d1c7.12 |  | 
						
							| 13 |  | aks6d1c7.13 |  | 
						
							| 14 |  | aks6d1c7.14 |  | 
						
							| 15 |  | aks6d1c7lem3.1 |  | 
						
							| 16 |  | nfcv |  | 
						
							| 17 |  | nfcv |  | 
						
							| 18 |  | nfcv |  | 
						
							| 19 |  | nfcv |  | 
						
							| 20 |  | simpl |  | 
						
							| 21 | 20 | oveq2d |  | 
						
							| 22 |  | simpr |  | 
						
							| 23 | 22 | oveq2d |  | 
						
							| 24 | 21 23 | oveq12d |  | 
						
							| 25 | 16 17 18 19 24 | cbvmpo |  | 
						
							| 26 |  | eqid |  | 
						
							| 27 |  | eqid |  | 
						
							| 28 |  | nfcv |  | 
						
							| 29 |  | nfcv |  | 
						
							| 30 |  | 2fveq3 |  | 
						
							| 31 | 30 | fveq1d |  | 
						
							| 32 | 28 29 31 | cbvmpt |  | 
						
							| 33 |  | eqid |  | 
						
							| 34 |  | eqid |  | 
						
							| 35 |  | nfcv |  | 
						
							| 36 |  | nfcv |  | 
						
							| 37 |  | nfcv |  | 
						
							| 38 |  | nfcv |  | 
						
							| 39 |  | fveq2 |  | 
						
							| 40 |  | 2fveq3 |  | 
						
							| 41 | 40 | oveq2d |  | 
						
							| 42 | 39 41 | oveq12d |  | 
						
							| 43 | 37 38 42 | cbvmpt |  | 
						
							| 44 | 43 | a1i |  | 
						
							| 45 |  | simpl |  | 
						
							| 46 | 45 | fveq1d |  | 
						
							| 47 | 46 | oveq1d |  | 
						
							| 48 | 47 | mpteq2dva |  | 
						
							| 49 | 44 48 | eqtrd |  | 
						
							| 50 | 49 | oveq2d |  | 
						
							| 51 | 35 36 50 | cbvmpt |  | 
						
							| 52 |  | nfcv |  | 
						
							| 53 |  | nfcv |  | 
						
							| 54 |  | nfv |  | 
						
							| 55 |  | nfv |  | 
						
							| 56 |  | simpl |  | 
						
							| 57 | 56 | fveq1d |  | 
						
							| 58 | 57 | sumeq2dv |  | 
						
							| 59 |  | fveq2 |  | 
						
							| 60 |  | nfcv |  | 
						
							| 61 |  | nfcv |  | 
						
							| 62 | 59 60 61 | cbvsum |  | 
						
							| 63 | 62 | a1i |  | 
						
							| 64 | 58 63 | eqtrd |  | 
						
							| 65 | 25 | eqcomi |  | 
						
							| 66 | 65 | a1i |  | 
						
							| 67 | 66 | imaeq1d |  | 
						
							| 68 | 67 | imaeq2d |  | 
						
							| 69 | 68 | fveq2d |  | 
						
							| 70 | 69 | oveq1d |  | 
						
							| 71 | 64 70 | breq12d |  | 
						
							| 72 | 52 53 54 55 71 | cbvrabw |  | 
						
							| 73 | 1 2 3 4 5 6 7 8 25 26 27 9 10 11 12 32 33 34 15 13 51 14 72 | aks6d1c7lem2 |  |