| Step | Hyp | Ref | Expression | 
						
							| 1 |  | dihatlat.a |  | 
						
							| 2 |  | dihatlat.h |  | 
						
							| 3 |  | dihatlat.u |  | 
						
							| 4 |  | dihatlat.i |  | 
						
							| 5 |  | dihatlat.l |  | 
						
							| 6 |  | eqid |  | 
						
							| 7 |  | eqid |  | 
						
							| 8 |  | eqid |  | 
						
							| 9 |  | eqid |  | 
						
							| 10 |  | eqid |  | 
						
							| 11 | 6 7 1 2 8 9 3 4 10 | dih1dimb2 |  | 
						
							| 12 | 11 | anassrs |  | 
						
							| 13 |  | simp3rr |  | 
						
							| 14 |  | simp1l |  | 
						
							| 15 | 2 3 14 | dvhlmod |  | 
						
							| 16 |  | simp3l |  | 
						
							| 17 |  | eqid |  | 
						
							| 18 | 6 2 8 17 9 | tendo0cl |  | 
						
							| 19 | 14 18 | syl |  | 
						
							| 20 |  | eqid |  | 
						
							| 21 | 2 8 17 3 20 | dvhelvbasei |  | 
						
							| 22 | 14 16 19 21 | syl12anc |  | 
						
							| 23 |  | simp3rl |  | 
						
							| 24 | 23 | neneqd |  | 
						
							| 25 | 24 | intnanrd |  | 
						
							| 26 |  | vex |  | 
						
							| 27 |  | fvex |  | 
						
							| 28 | 27 | mptex |  | 
						
							| 29 | 26 28 | opth |  | 
						
							| 30 | 29 | necon3abii |  | 
						
							| 31 | 25 30 | sylibr |  | 
						
							| 32 |  | eqid |  | 
						
							| 33 | 6 2 8 3 32 9 | dvh0g |  | 
						
							| 34 | 14 33 | syl |  | 
						
							| 35 | 31 34 | neeqtrrd |  | 
						
							| 36 | 20 10 32 5 | lsatlspsn2 |  | 
						
							| 37 | 15 22 35 36 | syl3anc |  | 
						
							| 38 | 13 37 | eqeltrd |  | 
						
							| 39 | 38 | 3expa |  | 
						
							| 40 | 12 39 | rexlimddv |  | 
						
							| 41 |  | eqid |  | 
						
							| 42 |  | eqid |  | 
						
							| 43 | 7 1 2 41 8 4 3 10 42 | dih1dimc |  | 
						
							| 44 | 43 | anassrs |  | 
						
							| 45 |  | simpll |  | 
						
							| 46 | 2 3 45 | dvhlmod |  | 
						
							| 47 |  | eqid |  | 
						
							| 48 | 7 47 1 2 | lhpocnel |  | 
						
							| 49 | 48 | ad2antrr |  | 
						
							| 50 |  | simplr |  | 
						
							| 51 |  | simpr |  | 
						
							| 52 | 7 1 2 8 42 | ltrniotacl |  | 
						
							| 53 | 45 49 50 51 52 | syl112anc |  | 
						
							| 54 | 2 8 17 | tendoidcl |  | 
						
							| 55 | 54 | ad2antrr |  | 
						
							| 56 | 2 8 17 3 20 | dvhelvbasei |  | 
						
							| 57 | 45 53 55 56 | syl12anc |  | 
						
							| 58 | 6 2 8 17 9 | tendo1ne0 |  | 
						
							| 59 | 58 | ad2antrr |  | 
						
							| 60 | 59 | neneqd |  | 
						
							| 61 | 60 | intnand |  | 
						
							| 62 |  | riotaex |  | 
						
							| 63 |  | resiexg |  | 
						
							| 64 | 27 63 | ax-mp |  | 
						
							| 65 | 62 64 | opth |  | 
						
							| 66 | 65 | necon3abii |  | 
						
							| 67 | 61 66 | sylibr |  | 
						
							| 68 | 33 | ad2antrr |  | 
						
							| 69 | 67 68 | neeqtrrd |  | 
						
							| 70 | 20 10 32 5 | lsatlspsn2 |  | 
						
							| 71 | 46 57 69 70 | syl3anc |  | 
						
							| 72 | 44 71 | eqeltrd |  | 
						
							| 73 | 40 72 | pm2.61dan |  |