Proof of Theorem rmxyadd
| Step | Hyp | Ref
| Expression |
| 1 | | simp1 1061 |
. . . 4
             |
| 2 | | zaddcl 11417 |
. . . . 5
 
     |
| 3 | 2 | 3adant1 1079 |
. . . 4
       
   |
| 4 | | rmxyval 37480 |
. . . 4
      
   
Xrm                Yrm                          |
| 5 | 1, 3, 4 | syl2anc 693 |
. . 3
        
Xrm                Yrm                          |
| 6 | | eluzelz 11697 |
. . . . . . . 8
    
  |
| 7 | 6 | 3ad2ant1 1082 |
. . . . . . 7
         |
| 8 | 7 | zcnd 11483 |
. . . . . 6
         |
| 9 | | zq 11794 |
. . . . . . . . . 10
   |
| 10 | | qsqcl 12935 |
. . . . . . . . . 10
       |
| 11 | 7, 9, 10 | 3syl 18 |
. . . . . . . . 9
             |
| 12 | | zssq 11795 |
. . . . . . . . . . 11
 |
| 13 | | 1z 11407 |
. . . . . . . . . . 11
 |
| 14 | 12, 13 | sselii 3600 |
. . . . . . . . . 10
 |
| 15 | 14 | a1i 11 |
. . . . . . . . 9
         |
| 16 | | qsubcl 11807 |
. . . . . . . . 9
     
         |
| 17 | 11, 15, 16 | syl2anc 693 |
. . . . . . . 8
               |
| 18 | | qcn 11802 |
. . . . . . . 8
               |
| 19 | 17, 18 | syl 17 |
. . . . . . 7
               |
| 20 | 19 | sqrtcld 14176 |
. . . . . 6
                   |
| 21 | 8, 20 | addcld 10059 |
. . . . 5
       
             |
| 22 | | rmbaserp 37484 |
. . . . . . 7
    
              |
| 23 | 22 | rpne0d 11877 |
. . . . . 6
    
              |
| 24 | 23 | 3ad2ant1 1082 |
. . . . 5
       
             |
| 25 | | simp2 1062 |
. . . . 5
         |
| 26 | | simp3 1063 |
. . . . 5
         |
| 27 | | expaddz 12904 |
. . . . 5
               
            
 
 
                                                    |
| 28 | 21, 24, 25, 26, 27 | syl22anc 1327 |
. . . 4
                                                             |
| 29 | | frmx 37478 |
. . . . . . . . 9
Xrm
          |
| 30 | 29 | a1i 11 |
. . . . . . . 8
       Xrm            |
| 31 | 30, 1, 25 | fovrnd 6806 |
. . . . . . 7
        Xrm    |
| 32 | 31 | nn0cnd 11353 |
. . . . . 6
        Xrm    |
| 33 | | frmy 37479 |
. . . . . . . . . 10
Yrm
          |
| 34 | 33 | a1i 11 |
. . . . . . . . 9
       Yrm            |
| 35 | 34, 1, 25 | fovrnd 6806 |
. . . . . . . 8
        Yrm    |
| 36 | 35 | zcnd 11483 |
. . . . . . 7
        Yrm    |
| 37 | 20, 36 | mulcld 10060 |
. . . . . 6
                   Yrm     |
| 38 | 30, 1, 26 | fovrnd 6806 |
. . . . . . 7
        Xrm    |
| 39 | 38 | nn0cnd 11353 |
. . . . . 6
        Xrm    |
| 40 | 34, 1, 26 | fovrnd 6806 |
. . . . . . . 8
        Yrm    |
| 41 | 40 | zcnd 11483 |
. . . . . . 7
        Yrm    |
| 42 | 20, 41 | mulcld 10060 |
. . . . . 6
                   Yrm     |
| 43 | 32, 37, 39, 42 | muladdd 10489 |
. . . . 5
          Xrm              Yrm      Xrm              Yrm         Xrm   Xrm                Yrm               Yrm        Xrm              Yrm      Xrm              Yrm        |
| 44 | | rmxyval 37480 |
. . . . . . 7
        
Xrm              Yrm                      |
| 45 | 1, 25, 44 | syl2anc 693 |
. . . . . 6
        
Xrm              Yrm                      |
| 46 | | rmxyval 37480 |
. . . . . . 7
        
Xrm              Yrm                      |
| 47 | 1, 26, 46 | syl2anc 693 |
. . . . . 6
        
Xrm              Yrm                      |
| 48 | 45, 47 | oveq12d 6668 |
. . . . 5
          Xrm              Yrm      Xrm              Yrm                                         |
| 49 | 43, 48 | eqtr3d 2658 |
. . . 4
           Xrm   Xrm                Yrm               Yrm        Xrm              Yrm      Xrm              Yrm                                          |
| 50 | 20, 41, 20, 36 | mul4d 10248 |
. . . . . . 7
                    Yrm               Yrm                             Yrm   Yrm      |
| 51 | 19 | msqsqrtd 14179 |
. . . . . . . 8
                                     |
| 52 | 41, 36 | mulcomd 10061 |
. . . . . . . 8
        
Yrm  
Yrm     Yrm   Yrm     |
| 53 | 51, 52 | oveq12d 6668 |
. . . . . . 7
                                Yrm   Yrm             Yrm   Yrm      |
| 54 | 50, 53 | eqtrd 2656 |
. . . . . 6
                    Yrm               Yrm            
Yrm  
Yrm      |
| 55 | 54 | oveq2d 6666 |
. . . . 5
          Xrm   Xrm                Yrm               Yrm        Xrm   Xrm           
Yrm  
Yrm       |
| 56 | 32, 20, 41 | mul12d 10245 |
. . . . . . 7
        
Xrm              Yrm                 Xrm   Yrm      |
| 57 | 39, 20, 36 | mul12d 10245 |
. . . . . . 7
        
Xrm              Yrm                 Xrm   Yrm      |
| 58 | 56, 57 | oveq12d 6668 |
. . . . . 6
          Xrm              Yrm      Xrm              Yrm                  
Xrm  
Yrm                 Xrm   Yrm       |
| 59 | 32, 41 | mulcld 10060 |
. . . . . . 7
        
Xrm  
Yrm     |
| 60 | 39, 36 | mulcld 10060 |
. . . . . . 7
        
Xrm  
Yrm     |
| 61 | 20, 59, 60 | adddid 10064 |
. . . . . 6
                    
Xrm  
Yrm     Xrm   Yrm                   Xrm   Yrm                 Xrm   Yrm       |
| 62 | 59, 60 | addcomd 10238 |
. . . . . . . 8
          Xrm   Yrm     Xrm   Yrm       Xrm   Yrm     Xrm   Yrm      |
| 63 | 39, 36 | mulcomd 10061 |
. . . . . . . . 9
        
Xrm  
Yrm     Yrm   Xrm     |
| 64 | 63 | oveq1d 6665 |
. . . . . . . 8
          Xrm   Yrm     Xrm   Yrm       Yrm   Xrm     Xrm   Yrm      |
| 65 | 62, 64 | eqtrd 2656 |
. . . . . . 7
          Xrm   Yrm     Xrm   Yrm       Yrm   Xrm     Xrm   Yrm      |
| 66 | 65 | oveq2d 6666 |
. . . . . 6
                    
Xrm  
Yrm     Xrm   Yrm                   Yrm   Xrm     Xrm   Yrm       |
| 67 | 58, 61, 66 | 3eqtr2d 2662 |
. . . . 5
          Xrm              Yrm      Xrm              Yrm                  
Yrm  
Xrm     Xrm   Yrm       |
| 68 | 55, 67 | oveq12d 6668 |
. . . 4
           Xrm   Xrm                Yrm               Yrm        Xrm              Yrm      Xrm              Yrm          Xrm   Xrm            Yrm   Yrm                   Yrm   Xrm     Xrm   Yrm        |
| 69 | 28, 49, 68 | 3eqtr2d 2662 |
. . 3
                            
Xrm  
Xrm            Yrm   Yrm                  
Yrm  
Xrm     Xrm   Yrm        |
| 70 | 5, 69 | eqtrd 2656 |
. 2
        
Xrm                Yrm          Xrm   Xrm           
Yrm  
Yrm                  
Yrm  
Xrm     Xrm   Yrm        |
| 71 | | rmspecsqrtnq 37470 |
. . . 4
    
              |
| 72 | 71 | 3ad2ant1 1082 |
. . 3
                     |
| 73 | | nn0ssq 11796 |
. . . 4
 |
| 74 | 30, 1, 3 | fovrnd 6806 |
. . . 4
        Xrm      |
| 75 | 73, 74 | sseldi 3601 |
. . 3
        Xrm      |
| 76 | 34, 1, 3 | fovrnd 6806 |
. . . 4
        Yrm      |
| 77 | 12, 76 | sseldi 3601 |
. . 3
        Yrm      |
| 78 | 73, 31 | sseldi 3601 |
. . . . 5
        Xrm    |
| 79 | 73, 38 | sseldi 3601 |
. . . . 5
        Xrm    |
| 80 | | qmulcl 11806 |
. . . . 5
  
Xrm   Xrm     Xrm   Xrm     |
| 81 | 78, 79, 80 | syl2anc 693 |
. . . 4
        
Xrm  
Xrm     |
| 82 | 12, 35 | sseldi 3601 |
. . . . . 6
        Yrm    |
| 83 | 12, 40 | sseldi 3601 |
. . . . . 6
        Yrm    |
| 84 | | qmulcl 11806 |
. . . . . 6
  
Yrm   Yrm     Yrm   Yrm     |
| 85 | 82, 83, 84 | syl2anc 693 |
. . . . 5
        
Yrm  
Yrm     |
| 86 | | qmulcl 11806 |
. . . . 5
          Yrm   Yrm             Yrm   Yrm      |
| 87 | 17, 85, 86 | syl2anc 693 |
. . . 4
                Yrm   Yrm      |
| 88 | | qaddcl 11804 |
. . . 4
    Xrm   Xrm           
Yrm  
Yrm        Xrm   Xrm           
Yrm  
Yrm       |
| 89 | 81, 87, 88 | syl2anc 693 |
. . 3
          Xrm   Xrm            Yrm   Yrm       |
| 90 | | qmulcl 11806 |
. . . . 5
  
Yrm   Xrm     Yrm   Xrm     |
| 91 | 82, 79, 90 | syl2anc 693 |
. . . 4
        
Yrm  
Xrm     |
| 92 | | qmulcl 11806 |
. . . . 5
  
Xrm   Yrm     Xrm   Yrm     |
| 93 | 78, 83, 92 | syl2anc 693 |
. . . 4
        
Xrm  
Yrm     |
| 94 | | qaddcl 11804 |
. . . 4
    Yrm   Xrm     Xrm   Yrm       Yrm   Xrm     Xrm   Yrm      |
| 95 | 91, 93, 94 | syl2anc 693 |
. . 3
          Yrm   Xrm     Xrm   Yrm      |
| 96 | | qirropth 37473 |
. . 3
                Xrm     Yrm        
Xrm  
Xrm            Yrm   Yrm       
Yrm  
Xrm     Xrm   Yrm         Xrm                Yrm          Xrm   Xrm            Yrm   Yrm                   Yrm   Xrm     Xrm   Yrm        Xrm       Xrm   Xrm           
Yrm  
Yrm      Yrm       Yrm   Xrm     Xrm   Yrm        |
| 97 | 72, 75, 77, 89, 95, 96 | syl122anc 1335 |
. 2
          Xrm                Yrm         
Xrm  
Xrm            Yrm   Yrm                  
Yrm  
Xrm     Xrm   Yrm        Xrm      
Xrm  
Xrm            Yrm   Yrm     
Yrm       Yrm   Xrm    
Xrm  
Yrm        |
| 98 | 70, 97 | mpbid 222 |
1
        
Xrm       Xrm   Xrm            Yrm   Yrm      Yrm      
Yrm  
Xrm     Xrm   Yrm       |