| Step | Hyp | Ref | Expression | 
						
							| 1 |  | bropopvvv.o |  | 
						
							| 2 |  | bropopvvv.p |  | 
						
							| 3 |  | bropopvvv.oo |  | 
						
							| 4 |  | brovpreldm |  | 
						
							| 5 |  | simpl |  | 
						
							| 6 | 2 | opabbidv |  | 
						
							| 7 | 5 5 6 | mpoeq123dv |  | 
						
							| 8 | 7 1 | ovmpoga |  | 
						
							| 9 | 8 | dmeqd |  | 
						
							| 10 | 9 | eleq2d |  | 
						
							| 11 |  | dmoprabss |  | 
						
							| 12 | 11 | sseli |  | 
						
							| 13 |  | opelxp |  | 
						
							| 14 |  | df-br |  | 
						
							| 15 |  | ne0i |  | 
						
							| 16 | 3 | breqd |  | 
						
							| 17 |  | brabv |  | 
						
							| 18 | 17 | anim2i |  | 
						
							| 19 | 18 | ex |  | 
						
							| 20 | 19 | adantr |  | 
						
							| 21 | 16 20 | sylbid |  | 
						
							| 22 | 21 | ex |  | 
						
							| 23 | 22 | com23 |  | 
						
							| 24 | 23 | a1d |  | 
						
							| 25 | 1 | mpondm0 |  | 
						
							| 26 |  | df-ov |  | 
						
							| 27 |  | fveq1 |  | 
						
							| 28 | 26 27 | eqtrid |  | 
						
							| 29 |  | 0fv |  | 
						
							| 30 | 28 29 | eqtrdi |  | 
						
							| 31 |  | eqneqall |  | 
						
							| 32 | 25 30 31 | 3syl |  | 
						
							| 33 | 24 32 | pm2.61i |  | 
						
							| 34 | 15 33 | syl |  | 
						
							| 35 | 14 34 | sylbi |  | 
						
							| 36 | 35 | pm2.43i |  | 
						
							| 37 | 36 | com12 |  | 
						
							| 38 | 37 | anc2ri |  | 
						
							| 39 |  | df-3an |  | 
						
							| 40 | 38 39 | imbitrrdi |  | 
						
							| 41 | 13 40 | sylbi |  | 
						
							| 42 | 12 41 | syl |  | 
						
							| 43 |  | df-mpo |  | 
						
							| 44 | 43 | dmeqi |  | 
						
							| 45 | 42 44 | eleq2s |  | 
						
							| 46 | 10 45 | biimtrdi |  | 
						
							| 47 |  | 3ianor |  | 
						
							| 48 |  | df-3or |  | 
						
							| 49 |  | ianor |  | 
						
							| 50 | 25 | dmeqd |  | 
						
							| 51 | 50 | eleq2d |  | 
						
							| 52 |  | dm0 |  | 
						
							| 53 | 52 | eleq2i |  | 
						
							| 54 | 51 53 | bitrdi |  | 
						
							| 55 |  | noel |  | 
						
							| 56 | 55 | pm2.21i |  | 
						
							| 57 | 54 56 | biimtrdi |  | 
						
							| 58 | 49 57 | sylbir |  | 
						
							| 59 |  | anor |  | 
						
							| 60 |  | id |  | 
						
							| 61 | 60 | ancri |  | 
						
							| 62 | 61 | adantr |  | 
						
							| 63 |  | mpoexga |  | 
						
							| 64 | 62 63 | syl |  | 
						
							| 65 | 64 | pm2.24d |  | 
						
							| 66 | 59 65 | sylbir |  | 
						
							| 67 | 66 | imp |  | 
						
							| 68 | 58 67 | jaoi3 |  | 
						
							| 69 | 48 68 | sylbi |  | 
						
							| 70 | 47 69 | sylbi |  | 
						
							| 71 | 46 70 | pm2.61i |  | 
						
							| 72 | 4 71 | syl |  | 
						
							| 73 | 72 | pm2.43i |  |