| Step | Hyp | Ref | Expression | 
						
							| 1 |  | lgsdilem2.1 |  | 
						
							| 2 |  | lgsdilem2.2 |  | 
						
							| 3 |  | lgsdilem2.3 |  | 
						
							| 4 |  | lgsdilem2.4 |  | 
						
							| 5 |  | lgsdilem2.5 |  | 
						
							| 6 |  | lgsdilem2.6 |  | 
						
							| 7 |  | mulrid |  | 
						
							| 8 | 7 | adantl |  | 
						
							| 9 |  | nnabscl |  | 
						
							| 10 | 2 4 9 | syl2anc |  | 
						
							| 11 |  | nnuz |  | 
						
							| 12 | 10 11 | eleqtrdi |  | 
						
							| 13 | 10 | nnzd |  | 
						
							| 14 | 2 3 | zmulcld |  | 
						
							| 15 | 2 | zcnd |  | 
						
							| 16 | 3 | zcnd |  | 
						
							| 17 | 15 16 4 5 | mulne0d |  | 
						
							| 18 |  | nnabscl |  | 
						
							| 19 | 14 17 18 | syl2anc |  | 
						
							| 20 | 19 | nnzd |  | 
						
							| 21 | 15 | abscld |  | 
						
							| 22 | 16 | abscld |  | 
						
							| 23 | 15 | absge0d |  | 
						
							| 24 |  | nnabscl |  | 
						
							| 25 | 3 5 24 | syl2anc |  | 
						
							| 26 | 25 | nnge1d |  | 
						
							| 27 | 21 22 23 26 | lemulge11d |  | 
						
							| 28 | 15 16 | absmuld |  | 
						
							| 29 | 27 28 | breqtrrd |  | 
						
							| 30 |  | eluz2 |  | 
						
							| 31 | 13 20 29 30 | syl3anbrc |  | 
						
							| 32 | 6 | lgsfcl3 |  | 
						
							| 33 | 1 2 4 32 | syl3anc |  | 
						
							| 34 |  | elfznn |  | 
						
							| 35 |  | ffvelcdm |  | 
						
							| 36 | 33 34 35 | syl2an |  | 
						
							| 37 | 36 | zcnd |  | 
						
							| 38 |  | mulcl |  | 
						
							| 39 | 38 | adantl |  | 
						
							| 40 | 12 37 39 | seqcl |  | 
						
							| 41 | 10 | peano2nnd |  | 
						
							| 42 |  | elfzuz |  | 
						
							| 43 |  | eluznn |  | 
						
							| 44 | 41 42 43 | syl2an |  | 
						
							| 45 |  | eleq1w |  | 
						
							| 46 |  | oveq2 |  | 
						
							| 47 |  | oveq1 |  | 
						
							| 48 | 46 47 | oveq12d |  | 
						
							| 49 | 45 48 | ifbieq1d |  | 
						
							| 50 |  | ovex |  | 
						
							| 51 |  | 1ex |  | 
						
							| 52 | 50 51 | ifex |  | 
						
							| 53 | 49 6 52 | fvmpt |  | 
						
							| 54 | 44 53 | syl |  | 
						
							| 55 |  | simpr |  | 
						
							| 56 | 2 | ad2antrr |  | 
						
							| 57 |  | zq |  | 
						
							| 58 | 56 57 | syl |  | 
						
							| 59 |  | pcabs |  | 
						
							| 60 | 55 58 59 | syl2anc |  | 
						
							| 61 |  | elfzle1 |  | 
						
							| 62 | 61 | adantl |  | 
						
							| 63 |  | elfzelz |  | 
						
							| 64 |  | zltp1le |  | 
						
							| 65 | 13 63 64 | syl2an |  | 
						
							| 66 | 62 65 | mpbird |  | 
						
							| 67 | 21 | adantr |  | 
						
							| 68 | 63 | adantl |  | 
						
							| 69 | 68 | zred |  | 
						
							| 70 | 67 69 | ltnled |  | 
						
							| 71 | 66 70 | mpbid |  | 
						
							| 72 | 71 | adantr |  | 
						
							| 73 |  | prmz |  | 
						
							| 74 | 73 | adantl |  | 
						
							| 75 | 4 | ad2antrr |  | 
						
							| 76 | 56 75 9 | syl2anc |  | 
						
							| 77 |  | dvdsle |  | 
						
							| 78 | 74 76 77 | syl2anc |  | 
						
							| 79 | 72 78 | mtod |  | 
						
							| 80 |  | pceq0 |  | 
						
							| 81 | 55 76 80 | syl2anc |  | 
						
							| 82 | 79 81 | mpbird |  | 
						
							| 83 | 60 82 | eqtr3d |  | 
						
							| 84 | 83 | oveq2d |  | 
						
							| 85 | 1 | ad2antrr |  | 
						
							| 86 |  | lgscl |  | 
						
							| 87 | 85 74 86 | syl2anc |  | 
						
							| 88 | 87 | zcnd |  | 
						
							| 89 | 88 | exp0d |  | 
						
							| 90 | 84 89 | eqtrd |  | 
						
							| 91 | 90 | ifeq1da |  | 
						
							| 92 |  | ifid |  | 
						
							| 93 | 91 92 | eqtrdi |  | 
						
							| 94 | 54 93 | eqtrd |  | 
						
							| 95 | 8 12 31 40 94 | seqid2 |  |