| Step | Hyp | Ref | Expression | 
						
							| 1 |  | xrsds.d |  | 
						
							| 2 |  | necom |  | 
						
							| 3 |  | xrleltne |  | 
						
							| 4 |  | mnfxr |  | 
						
							| 5 | 4 | a1i |  | 
						
							| 6 |  | simpl1 |  | 
						
							| 7 |  | simpl2 |  | 
						
							| 8 |  | pnfnre |  | 
						
							| 9 | 8 | neli |  | 
						
							| 10 |  | mnfle |  | 
						
							| 11 | 6 10 | syl |  | 
						
							| 12 |  | simpl3 |  | 
						
							| 13 | 5 6 7 11 12 | xrlelttrd |  | 
						
							| 14 |  | xrltne |  | 
						
							| 15 | 5 7 13 14 | syl3anc |  | 
						
							| 16 |  | xaddpnf1 |  | 
						
							| 17 | 7 15 16 | syl2anc |  | 
						
							| 18 | 17 | eleq1d |  | 
						
							| 19 | 9 18 | mtbiri |  | 
						
							| 20 |  | ngtmnft |  | 
						
							| 21 | 6 20 | syl |  | 
						
							| 22 |  | simpr |  | 
						
							| 23 |  | xnegeq |  | 
						
							| 24 |  | xnegmnf |  | 
						
							| 25 | 23 24 | eqtrdi |  | 
						
							| 26 | 25 | oveq2d |  | 
						
							| 27 | 26 | eleq1d |  | 
						
							| 28 | 22 27 | syl5ibcom |  | 
						
							| 29 | 21 28 | sylbird |  | 
						
							| 30 | 19 29 | mt3d |  | 
						
							| 31 |  | xrre2 |  | 
						
							| 32 | 5 6 7 30 12 31 | syl32anc |  | 
						
							| 33 |  | pnfxr |  | 
						
							| 34 | 33 | a1i |  | 
						
							| 35 | 6 | xnegcld |  | 
						
							| 36 |  | xnegpnf |  | 
						
							| 37 |  | pnfge |  | 
						
							| 38 | 7 37 | syl |  | 
						
							| 39 | 6 7 34 12 38 | xrltletrd |  | 
						
							| 40 |  | xltnegi |  | 
						
							| 41 | 6 34 39 40 | syl3anc |  | 
						
							| 42 | 36 41 | eqbrtrrid |  | 
						
							| 43 |  | xrltne |  | 
						
							| 44 | 5 35 42 43 | syl3anc |  | 
						
							| 45 |  | xaddpnf2 |  | 
						
							| 46 | 35 44 45 | syl2anc |  | 
						
							| 47 | 46 | eleq1d |  | 
						
							| 48 | 9 47 | mtbiri |  | 
						
							| 49 |  | nltpnft |  | 
						
							| 50 | 7 49 | syl |  | 
						
							| 51 |  | oveq1 |  | 
						
							| 52 | 51 | eleq1d |  | 
						
							| 53 | 22 52 | syl5ibcom |  | 
						
							| 54 | 50 53 | sylbird |  | 
						
							| 55 | 48 54 | mt3d |  | 
						
							| 56 |  | xrre2 |  | 
						
							| 57 | 6 7 34 12 55 56 | syl32anc |  | 
						
							| 58 | 32 57 | jca |  | 
						
							| 59 | 58 | ex |  | 
						
							| 60 | 59 | 3expia |  | 
						
							| 61 | 60 | 3adant3 |  | 
						
							| 62 | 3 61 | sylbird |  | 
						
							| 63 | 2 62 | biimtrid |  | 
						
							| 64 | 63 | 3exp |  | 
						
							| 65 | 64 | com34 |  | 
						
							| 66 | 65 | 3imp1 |  |