| Step | Hyp | Ref | Expression | 
						
							| 1 |  | ltrneq2.a |  | 
						
							| 2 |  | ltrneq2.h |  | 
						
							| 3 |  | ltrneq2.t |  | 
						
							| 4 |  | simpl1 |  | 
						
							| 5 |  | simpl3 |  | 
						
							| 6 |  | eqid |  | 
						
							| 7 | 6 2 3 | ltrn1o |  | 
						
							| 8 | 4 5 7 | syl2anc |  | 
						
							| 9 |  | simpl2 |  | 
						
							| 10 |  | simpr3 |  | 
						
							| 11 |  | eqid |  | 
						
							| 12 | 11 1 2 3 | ltrncnvat |  | 
						
							| 13 | 4 9 10 12 | syl3anc |  | 
						
							| 14 | 6 1 | atbase |  | 
						
							| 15 | 13 14 | syl |  | 
						
							| 16 |  | f1ocnvfv1 |  | 
						
							| 17 | 8 15 16 | syl2anc |  | 
						
							| 18 |  | simpr2 |  | 
						
							| 19 |  | fveq2 |  | 
						
							| 20 |  | fveq2 |  | 
						
							| 21 | 19 20 | eqeq12d |  | 
						
							| 22 | 21 | rspcv |  | 
						
							| 23 | 13 18 22 | sylc |  | 
						
							| 24 | 6 2 3 | ltrn1o |  | 
						
							| 25 | 4 9 24 | syl2anc |  | 
						
							| 26 | 6 1 | atbase |  | 
						
							| 27 | 10 26 | syl |  | 
						
							| 28 |  | f1ocnvfv2 |  | 
						
							| 29 | 25 27 28 | syl2anc |  | 
						
							| 30 | 23 29 | eqtr3d |  | 
						
							| 31 | 30 | fveq2d |  | 
						
							| 32 | 17 31 | eqtr3d |  | 
						
							| 33 | 32 | breq1d |  | 
						
							| 34 |  | simpr1 |  | 
						
							| 35 |  | f1ocnvfv1 |  | 
						
							| 36 | 25 34 35 | syl2anc |  | 
						
							| 37 | 36 | breq2d |  | 
						
							| 38 |  | f1ocnvfv1 |  | 
						
							| 39 | 8 34 38 | syl2anc |  | 
						
							| 40 | 39 | breq2d |  | 
						
							| 41 | 33 37 40 | 3bitr4d |  | 
						
							| 42 |  | simpl1l |  | 
						
							| 43 |  | eqid |  | 
						
							| 44 | 2 43 3 | ltrnlaut |  | 
						
							| 45 | 4 9 44 | syl2anc |  | 
						
							| 46 | 6 2 3 | ltrncl |  | 
						
							| 47 | 4 9 34 46 | syl3anc |  | 
						
							| 48 | 6 11 43 | lautcnvle |  | 
						
							| 49 | 42 45 27 47 48 | syl22anc |  | 
						
							| 50 | 2 43 3 | ltrnlaut |  | 
						
							| 51 | 4 5 50 | syl2anc |  | 
						
							| 52 | 6 2 3 | ltrncl |  | 
						
							| 53 | 4 5 34 52 | syl3anc |  | 
						
							| 54 | 6 11 43 | lautcnvle |  | 
						
							| 55 | 42 51 27 53 54 | syl22anc |  | 
						
							| 56 | 41 49 55 | 3bitr4d |  | 
						
							| 57 | 56 | 3exp2 |  | 
						
							| 58 | 57 | imp |  | 
						
							| 59 | 58 | ralrimdv |  | 
						
							| 60 |  | simpl1l |  | 
						
							| 61 |  | simpl1 |  | 
						
							| 62 |  | simpl2 |  | 
						
							| 63 |  | simpr |  | 
						
							| 64 | 61 62 63 46 | syl3anc |  | 
						
							| 65 |  | simpl3 |  | 
						
							| 66 | 61 65 63 52 | syl3anc |  | 
						
							| 67 | 6 11 1 | hlateq |  | 
						
							| 68 | 60 64 66 67 | syl3anc |  | 
						
							| 69 | 59 68 | sylibd |  | 
						
							| 70 | 69 | ralrimdva |  | 
						
							| 71 | 24 | 3adant3 |  | 
						
							| 72 |  | f1ofn |  | 
						
							| 73 | 71 72 | syl |  | 
						
							| 74 | 7 | 3adant2 |  | 
						
							| 75 |  | f1ofn |  | 
						
							| 76 | 74 75 | syl |  | 
						
							| 77 |  | eqfnfv |  | 
						
							| 78 | 73 76 77 | syl2anc |  | 
						
							| 79 | 70 78 | sylibrd |  | 
						
							| 80 |  | fveq1 |  | 
						
							| 81 | 80 | ralrimivw |  | 
						
							| 82 | 79 81 | impbid1 |  |