| 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 |  | simpl1 |  | 
						
							| 9 | 8 | hllatd |  | 
						
							| 10 |  | simpl2 |  | 
						
							| 11 |  | simpl3 |  | 
						
							| 12 | 1 3 | latjcl |  | 
						
							| 13 | 9 10 11 12 | syl3anc |  | 
						
							| 14 |  | eqid |  | 
						
							| 15 | 1 14 6 | pmapssat |  | 
						
							| 16 | 8 13 15 | syl2anc |  | 
						
							| 17 |  | simpr2 |  | 
						
							| 18 | 1 3 | latjcl |  | 
						
							| 19 | 9 10 17 18 | syl3anc |  | 
						
							| 20 |  | simpr3 |  | 
						
							| 21 | 1 3 | latjcl |  | 
						
							| 22 | 9 11 20 21 | syl3anc |  | 
						
							| 23 | 1 4 | latmcl |  | 
						
							| 24 | 9 19 22 23 | syl3anc |  | 
						
							| 25 | 1 14 6 | pmapssat |  | 
						
							| 26 | 8 24 25 | syl2anc |  | 
						
							| 27 | 8 16 26 | 3jca |  | 
						
							| 28 | 1 3 6 7 | pmapjoin |  | 
						
							| 29 | 9 10 11 28 | syl3anc |  | 
						
							| 30 | 1 3 6 7 | pmapjoin |  | 
						
							| 31 | 9 10 17 30 | syl3anc |  | 
						
							| 32 | 1 3 6 7 | pmapjoin |  | 
						
							| 33 | 9 11 20 32 | syl3anc |  | 
						
							| 34 |  | ss2in |  | 
						
							| 35 | 31 33 34 | syl2anc |  | 
						
							| 36 | 1 4 14 6 | pmapmeet |  | 
						
							| 37 | 8 19 22 36 | syl3anc |  | 
						
							| 38 | 35 37 | sseqtrrd |  | 
						
							| 39 | 29 38 | jca |  | 
						
							| 40 | 14 7 | paddss12 |  | 
						
							| 41 | 27 39 40 | sylc |  | 
						
							| 42 | 1 3 6 7 | pmapjoin |  | 
						
							| 43 | 9 13 24 42 | syl3anc |  | 
						
							| 44 | 41 43 | sstrd |  |