| Step | Hyp | Ref | Expression | 
						
							| 1 |  | pl42lem.b |  | 
						
							| 2 |  | pl42lem.l |  | 
						
							| 3 |  | pl42lem.j |  | 
						
							| 4 |  | pl42lem.m |  | 
						
							| 5 |  | pl42lem.o |  | 
						
							| 6 |  | pl42lem.f |  | 
						
							| 7 |  | pl42lem.p |  | 
						
							| 8 |  | simp11 |  | 
						
							| 9 | 8 | hllatd |  | 
						
							| 10 |  | simp12 |  | 
						
							| 11 |  | simp13 |  | 
						
							| 12 | 1 3 | latjcl |  | 
						
							| 13 | 9 10 11 12 | syl3anc |  | 
						
							| 14 |  | simp21 |  | 
						
							| 15 | 1 4 | latmcl |  | 
						
							| 16 | 9 13 14 15 | syl3anc |  | 
						
							| 17 |  | simp22 |  | 
						
							| 18 | 1 3 | latjcl |  | 
						
							| 19 | 9 16 17 18 | syl3anc |  | 
						
							| 20 |  | simp23 |  | 
						
							| 21 |  | eqid |  | 
						
							| 22 | 1 4 21 6 | pmapmeet |  | 
						
							| 23 | 8 19 20 22 | syl3anc |  | 
						
							| 24 |  | hlop |  | 
						
							| 25 | 8 24 | syl |  | 
						
							| 26 | 1 5 | opoccl |  | 
						
							| 27 | 25 17 26 | syl2anc |  | 
						
							| 28 | 1 2 4 | latmle2 |  | 
						
							| 29 | 9 13 14 28 | syl3anc |  | 
						
							| 30 |  | simp3r |  | 
						
							| 31 | 1 2 9 16 14 27 29 30 | lattrd |  | 
						
							| 32 | 1 2 3 6 5 7 | pmapojoinN |  | 
						
							| 33 | 8 16 17 31 32 | syl31anc |  | 
						
							| 34 | 1 4 21 6 | pmapmeet |  | 
						
							| 35 | 8 13 14 34 | syl3anc |  | 
						
							| 36 |  | simp3l |  | 
						
							| 37 | 1 2 3 6 5 7 | pmapojoinN |  | 
						
							| 38 | 8 10 11 36 37 | syl31anc |  | 
						
							| 39 | 38 | ineq1d |  | 
						
							| 40 | 35 39 | eqtrd |  | 
						
							| 41 | 40 | oveq1d |  | 
						
							| 42 | 33 41 | eqtrd |  | 
						
							| 43 | 42 | ineq1d |  | 
						
							| 44 | 23 43 | eqtrd |  | 
						
							| 45 | 44 | 3expia |  |