: VLS (RLS) . 3. Winter Variation, No Edges, Summer Variation, Edge Control
 


         - .    ,        OLL.      .          : Winter Variation, No edges  Edge Control.    Summer Variation (HLS).   :     ,       ,   .





: VLS (RLS) . 3

Winter Variation, No Edges, Summer Variation, Edge Control



 



 ,2020



ISBN978-5-4498-9228-7 (. 3)

ISBN978-5-4498-1632-0

     Ridero







           .

 ,        ( )    .       ,    .               ,   ,     ,       .    ,    ,     (,  ..).

      RLS (VLS) (Valk / Rowe Last Slot)  頫 蠫.      Edge Control, WINTER VARIATION, NO Edges SUMMER VARIATION ().            :F2L.

  SUMMER VARIATION  ,       (        Edge Control).

    https://www.speedsolving.com/wiki/index.php/OLS    RLS ( ).






  VLS (RLS)



      ?    (,         )     ,          (  ).



  


         (  ).  ,      RLS.  ,      ,     MatsValk, Rowe Hessler. Lucas Winter      Winter Variation.

     (https://www.speedsolving.com/wiki/index.php/VLS)https://www.speedsolving.com/wiki/index.php/VLS (https://ridero.ru/link/U13QPFOQmLC1u5).






 



 

  (Winter Variation)  VLS     (Lucas Winter) 2005.

  VLS       (MatsValk) 2009.      , ,          ,    OLS .

  , 2013  (Rowe Hessler)    .           -,   RLS,   Rowe Last Slot (  ).   ,         .    - ,      VLS- HLS-    ,   VLS HLS.  , 2014,      algdb  VLS-,    VRLS,   Valk-Rowe Last Slot,          VLS.

          VLS.   Mats Valk  Welcome toAcademy2018  VLS 4:45, ,   . (https://www.youtube.com/watch?v=ZWhGFoSySDI).

 ,     ,     VLS (RLS)   Winter Variation,     .




   


         .






 



           .

    .    ,         .






   



  -        .         .

      ,        .            .

  (  )    : 1)   ( ); 2)   (); 3)      ; 4)   .

Ѡ             ().    ,          -.     .




   


  -  ,  -,         .

  1






 1.  



  ,  ?

       .        ,       ,   .

  ( ,  )      .

   M.       R  L .   M     L.

   S.      F  B .    S     F.    E.      D  U.        D.  ,          .  ,   ?

       

ED ML SF

      ,   .

  ,      .

       ,     .   ( , , , , )     .   ( , , , , )     .

  -   ,    .     2.

 2.  






  



Ѡ    (   ,   )      ,   .   3      .

 3.  






 



        .      ,   -,      .

, U2        .




 -


-     .      ,      .     . -      (  -),      /     ().

 -       .




Edge control  





 Edge control


         .   VLS         VLS.    (  8),       .




UFVLS

( UF)


     UFVLS    220(UF15) 






 220(UF15) 





R


F RF




    4 ,     7 OLL.

U* VLS ( U*)




UBVLS

( UB)


      UBVLS  .      6:



1_


) y


U2 (R2


F R F


)R

2_


) U2F2 (Rw URw


)F

3_


) Uy F (R U


R


F


)

4_


) UR y (R U


R


F


)

5_


)(UR B) (U


B


R


)

6_


) (ULw U) (F


U


Lw


) = (ULw UF


 U


Lw


)

1) 2)     100(UB05)






 100(UB05)



3) 6)      200(UB19)






  200(UB19)



   7- 

7_


) U(F


L


U2 L UF)

8_


)(y


U) R


F


U2 F UR=Dw R


(F


U2 F U)R

9_


)(F


U2 F U) (R UR


)

7) 8)     600(UB17)






 600(UB17)



9)   211(UB22)






 211(UB22)



    4 ,     7 OLL.

    - (UR U


R


)  OLL   .




ULVLS

( UL)


   6

1_


) U F


(L


U


L)F

2_


) y


U(R


F


 U


FR) = Dw (R


F


 U


FR)

   7

3_


) U(F


U2 F) (R U


R


)

4_


) R


U


(F UR U


) F


= (R


U


F) U (R U


F


) = (R


U


F UR) U


F






1) 3)      200(UL19).






 200(UL19)



4)     200(UL06).






  200(UL06)



    ().

    4 ,     7 OLL.

    - (UR U


R


)  OLL   .




UBULVLS

(  UB UL)


     UBULVLS      301(UBUL16) 7.






 301(UBUL16)



1_


) (Ux


(R2 U


R


U) x U


)R




2_


) UR (R B


R


B) U


R


= U(R2 B


R


B) U


R




3_


) 


 F R (R U


R


U) F


R


 x = 


 F (R2 U


R


U) F


R


x

4_


) y U (F2 R


F


R) U


F


= y UF (F R


F


R) U


F




  4- ,          B B


.

     ࠖ   8, 9, . .

    4 ,     7 OLL.

   - (UR U


R


)  OLL   .        (  ).

U* VLS (  U* U*)




UFUBVLS

(  UF UB)


,       UFUBVLS    920(UFUB11),    VLS.






 920(UFUB11)



1_


) R


F R2 UR


U


F


= (R


F R*) (R UR


U


)F




      .     .

    4 ,     7 OLL.

    - (UR U


R


)  OLL   .




UFULVLS

(  UF UB)


   7- .    8- .

1_


) y


U


 R D (Rw


URw) D


R




2_


) Dw (R2 D


L F


 L


DR2)

3_


) y


U R2 D


(RwU


Rw


) DR2 = Dw R2 D


(RwU


Rw


) DR2

4_


) R


U


F UR2 U


R


F


= (R


U


F UR) (R U


R


F


)

1)        410(UFUL01)






  410(UFUL01)



2) 3)     910(UFUL06)






  910(UFUL06)



4)     320(UFUL07)






  320(UFUL07)



    4 ,     7 OLL.

    (R


F RF


)  OLL   .




No edgesVLS

(  )


ʠ   8- .

 9-    210(NE19)






  : VLS (RLS) . 3



1_


) U2 (x U


(Rw


U2 Rw) Ux


) (R U2R


)

2_


) U2 (F


L


U2 L F) (R U2R


)

 9    10- 

3_


) U2 (R


F R F


) U2 (R


F RF


)

 3)     () 211(NE24)






 () 211(NE24)



    4 ,     7 OLL.

    (R


F RF


)   OLL   .




All edgesVLS

(  )


 ,    Edge Control,     .          Edge Control.        ,     .

                http://www.cyotheking.com/.

1_


) Lw


(U2 R U2 Rw


) U2L

       (  8- 9- ).     400(WVLS01)






 400(WVLS01)



   ,       .

,      ,          - (UR U


R


).

- (U2 R U2 R


)     4.




VLS





 


  VLS    (    OLL)     ,   FR   .

               (  )    .

     :

1)    FRD FR ( F R);

2)  F ,   FUL FU

3)  R RUB.

       .

    :

1)   ();

1)   ();

2)   (  );

2)   (  );

3)  ;

4)  .



 .

   :

    (FR)






    (FR) 1



    (FR)






    (FR) 3



  (  )






  (  )  蠖 2



  (  )






  (  )  蠖 4



 






   蠖 6



   






   蠖 9



 .

     :

1)     F;

2) ;

3)  ( ).

   :

  






  蠖 1



  






  蠖 2



     ,     ,    OLL      .      1.






-  蠖 1



 .

 ( )    :

1)     (  ,  );

2) .

     ,   :






  蠖 1



   ,            .

 0  .  1   .  3      .  2  2 .  4  2 .

 6   (2:    R  FR,   F  FRU).  9( 6)    (2:    F  FR,   R  FRU).

        FR,      .

      (  ).     ,               .




3  (WINTER VARIATION)



       (WINTER VARIATION).         : , , , , , , , .

       .

    :     (   ).     .      .     : , ,  (   )  .

  (     ).     ,       .

 ,       8 . ,  , -   ,     .   8,  27.  27 8.     ,   2n,  n=0, 1, 2, 3: 1, 2, 4 8.






  VLS



      (1 8)    . 2 4    ().

      27=1*1+3*2+3*4+1*8(1 1, 3 2, 3 4, 1 8).

       ,   :  ,  ,  ,  ,   ..

     ( ). Ѡ ,     .          (),     .

 ,     .           (      ).

   .






  



    ,         .




1.1 400(WVLS01)









 400(WVLS01)



   400(WVLS01).

VLS  400(WVLS01)

1_


) UL


 U2 R UR


 U2L = UL


 U2 (R UR


U


) U


L = U L


U2 (R UR


) U2L = U+ (L


U2 R) U(R


U2L)

2_


) U


 L


 U2 R U


 R


 U2L = U


L


U (UR U


R


) U2L = U


 L


U2 (R U


R


) U2L =U


+ (L


U2 R) U


(R


U2L)

3_


) y


 U Rw D (Rw


 U


 Rw) D


 Rw


= Dw Rw D (Rw


U


Rw) D


Rw


= Dw (Rw D Rw


) U


(Rw D


Rw


)

4_


) (R2 D R


) U(R D


 R2) (UR U


R


)

5_


) Lw


(U2 R U2 Rw


) U2L = (Lw


U2 R) U2 (Rw


U2L)

6_


) UR U


 (R D R


) UR D


 R


 U


R


 = (UR U


R


) (R2 D R


) U(R D


R2) (RU


R


)

7_


) y U(Lw D Lw


) U


 (Lw D


Lw


)

 ?

1)  1- 2-  ,      ,   .  L R  ,    .       ,    .

 ,       .       .  ,  ,       ,    .   1-, 2- 5-      expert-VLS.

 (UL


)   .

 U


L      (     ).

:  400-   -  .

2)  1).

3)

4) - (R2 D R


) (R D


R2)   .

- (R2 D R


) U(R D


R2)  .

:  400-   .

5)      http://www.cyotheking.com.   ,      algdb.net  .

    .      (   ),            .

    1- 2-.

6) - (R2 D R


) U(R D


R2)  .

:  400-   ,   .

- (R2 D R


) U(R D


R2)      Uc    u,   .

:   400    400 .   .

7)   Easiest Winter Variation (OLL Skip) Cases (https://www.youtube.com/watch?v=rbRJWAH_pts) (https://www.youtube.com/watch?v=rbRJWAH_pts (https://ridero.ru/link/1xYn-ShHrbYZrw))

  ?

Lw


(U2 R U2 Rw


) U2L (  )

(R UR


 U


) (R2 D R


) U


 (R D


R2)




1.2 901(WVLSS02)









 901(WVLS02)



     .    901(WVLS02).

VLS  901(WVLS02)

1_


) UR U


R




 ?

1)  :   -,    .

:  901   .

  ?

(R UR


U


)




1.3 300(WVLS03)









 300(WVLS03)



     .    300(WVLS02).

VLS  300(WVLS03)

1_


) (R


 F R *) (UR U


R


)F




2_


) (U


 L U


 R) (UL


 UR


)

 ?

1)    - (R


F R F


)     .   .

    - (R


F R F


) F (UR U


R


) F


    F


 F.

-(R


F R *),     -D.

- F (UR U


R


) F


   .

: 300    .

:  300 -D  .

       ࠹87 (https://www.youtube.com/watch?v=kRm6ADY2i8w).  https://www.youtube.com/watch?v=kRm6ADY2i8w (https://ridero.ru/link/WXIGqyWR0nr4Kt))

2)

:.

  ?

F (R UR


U


) (* R


 F


R)




1.4 900(WVLS04)









 900(WVLS04)



      .    900(WVLS04).

VLS  900(WVLS04)

1_


) U+ (R2 D R


) U


 (R D


R2)

 ?

1) - (R2 D R


) (R D


R2)   -.

  - (R2 D R


) (R D


R2).  - ,    . - (R2 D R


)  . - (R D


R2)   .

 - (R2 D R


) U


(R D


R2)      .

:   900   .

  ?

(R2 D R


) U(R D


R2)U




  410(SV02)   900(WVLS04) U




M x D L UL


D


M


x


 U


= M x D L U L


D





M


U







1.5 300(WVLS05)









 300(WVLS05)



      .    300(WVLS05).

VLS  300(WVLS05)

1_


) (UR U


R


) (* UR


 U


) (R U


 R


 U) UR = (UR U


R


) U(R


U


R U


R


U2R)

2_


) (UR U


R


) U2 (R U2 R


 U


) (R U


R


) = (UR U


R


) (U2 R U2


 R


) (U


R U


R


) = (UR U


R


) U2 (R U2 R


UR U


R


)

3_


) U2 R2 B R


 U


 R


 UR B


 U2R




4_


) (UR U


R


) UR


 UL U


 R UL


) = (UR U


R


) U((R


UL) U


(R UL


))

 ?

 ,  3-  -      젖    .

1)  - (UR U


R


)  .

 - (* UR


U


)   - (),   ,    . - (UR


U


)        .

 - (R U


R


U)   .

    :  300, , , ,   ࠫ (UR): .

:       300 : ,  , , .

  ,   - (UR U


R


)  OLL  ,    .

- (* UR


U


)  .

2)  - (UR U


R


)  .  - (R U2 R


U


)  .  - (R U


R


)    .

    :  300, , , ,  .

: 300   -  ,     .

 -.

 - (UR U


R


)  .

- (U2 R U2


R


)   .

- (U


R U


R


)  .

: 300  ,     .

  ,   - (UR U


R


)  OLL  ,     (  ).

3)

4)   ,   - (UR U


R


)  OLL  ,     (  ).

,    UBR  [1 -          (L


 UR),   .] .     UBR.

  ?

(R UR


UR U2 R


) U2 (R UR


U


)




1.6 900(WVLS06)









 900(WVLS06)



     .    900(WVLS06).

VLS  900(WVLS06)

1_


) (R U


 R


 U) (UR U


 R


) U2 (R UR


) = (R U


R


) U2 (R U


R


) U2 (R UR


) = (R U


R


U) U(R U


R


U) U(R UR


) = (R U


R


U2) (R U


R


U2) (R UR


)

2_


) U


 R


 D


(R U2 R


) D R2 U


R


= U


 R


D


(R U2 R


) D R (R U


R


) = U


R


(D


R U2 R


D) R2 U


R




 ?

1)  - (R U


R


U)  .  - (UR U


R


)  .   (R UR


)  -  .

:  900   ,    .

:  900       .

2) - R


D


(R U2 R


) DR   ( ).

: 900-     ,    .

  ?

(R U


 R


) U2 (R UR


) U2 (R UR


)




1.7 310(WVLS07)









 310(WVLS07)



     .    310(WVLS07).

VLS  310(WVLS07)

1_


) U(R UR


U


) (R U


R


) = (UR UR


) (U


R U


R


)

2_


) (R


 U


 R U) (R U


 R


 U


) (R


 UR)

 ?

1) - (UR UR


)  . - (U


R U


R


)  .

:   310 ,    .

2) - (R


U


R U)  .  - (R U


R


U


)  . - (R


U


R)     .

:  310 :     .

  ?

(R UR


U) (R U


R


U


)




1.8 300(WVLS08)









 300(WVLS08)



      .    300(WVLS08).

VLS  300(WVLS08)

1_


) U2 R U


 R


 UR U2 R


 = U(UR U


R


) U(R U2R


) = (U2 R U


R


) (UR U2


 R


) = U2 (R U


R


U) (R U2R


)

 ?

1)      ,    -:

- (R U


R


U)  .

- (R U2R


)    .

:    300  .

  ?

(R U2R


) (U


 R UR


)U2




1.9 410(WVLS09)









 410(WVLS09)



      .    410(WVLS09).

VLS  410(WVLS09)

1_


) U2 F


(R U2 R


 U2


) (R


 FR*)

2_


) U L


 U2 R (UL U


 L


 U) R


 U2L

3_


) U2 F2 (R U2 R


 U2


) (R


 F2R*)

4_


) U2 L


 (R UR


 U


) (R UR


U


) L (U


 R U


R


)

5_


) (UR U


 R


) UR U2 (R2 U


 R2 U


 R2 U2R)

 ?

1)  - (R U2 R


U2


)   .  - (R


FR F


)  ,       (    180⠖ U2).

-(R


F R *),     -D.

: 410      -D.

2)    http://www.cyotheking.com/winter-variation/   .

3)   (U2 F2)    .

- (R U2 R


U2


)   .

- (R


F2R*)  - (R


F2R F


)   . - (R


F2R F


)   .

- (R


F2R*)   -D.

: 410-         -D.

  -   (R


F2R F2


)    .

4)

5)    (https://ridero.ru/link/ZQHd3rTDEk97Dq)(https://jperm.net/algs/wv (https://ridero.ru/link/ZQHd3rTDEk97Dq)).

  - (R2 U


R2 U


) R2 U2R   ,  .  -    .

- UR   .

  :  410, , , ,  .

:.

  ?

(* R


 F


 R) (U2 R U2


 R


) FU2




1.10 400(WVLS10)









 400(WVLS10)



      .    400(WVLS10).

VLS  400(WVLS10)

1_


) (R


 F R2 UR


 U


) (R UR


 U


) F


 = (R


F R *) (R UR


U


) (R UR


U


)F




2_


) UR U (R2 U


 R2 U


) R2 U2R

3_


) U2 F2 (L


 UL U) (L


 U


 L)F2

4_


) U2 F2 (Rw


F Rw U) (* Rw


F


 Rw)F2

 ?

1)  - (R


F R2 UR


U


)      OLL  .






    



   - ࠖ  -,  F


.

:    400.

   -,   - (R


FR F


)  ,      .     -.

-(R


F R *),     -D.

:   400-D ,   (-)  .

 .

-(R


F R2 UR


U


F


)  .  VLS 920(UFUB11),        렖 .

:   400     F


  .

2) - (UR U)  .

- (R2 U


R2 U


) R2 U2R   310(SV18).   - (R2 U


R2 U


) R2 U2R   ,  .

: 400 -    ࠖ  .

 ,     ,   -.

   :  400   910- -   .

3)  (U2 F2)    .

4)   3-     .

  ?

F (UR U


 R


) (UR U


R


) (* R


 F


R)




1.11 910(WVLS11)









 910(WVLS11)



      .    910(WVLS11).

VLS  910(WVLS11)

1_


) U2 + (R


 U


 R2 U


) R2 U2R = U2 R


U


(R2 U


R2 U) UR

 ?

1) - (R2 U


R2 U)   ( ).   - .

 (R


U


)   .

 (UR)  ,  ࠫ: , .

    :  910, , ,  () , .

: 910       .

   :  400   910- -   .

  ?

(R


U2 R2 UR2) URU2




1.12 301(WVLS12)









 301(WVLS12)



      .      ( ).    301(WVLS12).

VLS  301(WVLS12)

1_


) (R


 F2 R F2) (UL


 UL)

2_


) UR U2 L UL


 R


 U2 L UL


= U R U2 (L UL


) R


U2 (L UL


)

3_


) (UR U


) (x


 UR


 D) R U


 R


 D




 ?

1)  - (R


F2 R F2)   -.  - (UL


UL)    .  ,      . - (UL


UL)  .  8-         .

    :  301, -, .

:  301  렖     ,  -   .

2)

3)

  ?

(L


 U


 L U


) (F2 R


 F2


R)




1.13 411(WVLS13)









 411(WVLS13)



      .      ( ).    411(WVLS13).

VLS  411(WVLS13)

1_


) U2 R U2 R2 U


 R U


 R


 U2R = (U2 R U2


 R


) R


 U


(R U


R


U) UR

2_


) (R


 F R F


) (R


 U


 F


 UFR) = (R


F R F


) (R


U


F


) (UFR) = (R


F R F


) (R


 (U


F


UF)R)

3_


) U


 F2 L


 UL U


 L


 U


 LF2 = U


 F2 (L


UL U


) (L


U


L)F2

 ?

1) - (U2 R U2 R


)   .

 (R


U


)   .

 (UR)  ,  ࠫ: , .

    :  411,  , , , .

:  411    .

2) - R


(U


F


UF) R  .

:  411  .

3)  (F2)   .

 F2 (L


UL U


) (L


U


L) F2     311(WVLS26).    ( 1)     400(WVLS10).

  ?

R


U


(U


RUR


) UR (R U2R


U2)




1.14 400(WVLS14)









 400(WVLS14)



      .      ( ).    400(WVLS14).

VLS  400(WVLS14)

1_


) U2 R2 D R


 U2 R D


R2 U2 =U2 R2 (D R


U2 R D


) R2U2 = U2 (R2 D R


) U2 (R D


R2)+U2

2_


) U2 L


 UR U


 L U2R


= U2


 L


(UR U


) L U2R




 ?

1)      algdb.net    U2,        .        .      - (R2 D R


) (R D


R2),     .

:  400      .

 - (R2 D R


) U2 (R D


 R2),   ,   .

:     400 .

2)    - (UR U


R


),      .

  (U2


L


) (L U2)      .     -.

- (UR U


)  .

  ?

U2 (R2 D R


) U2 (R D


R2)U2




1.15 910(WVLS15)









 910(WVLS15)



      .      ( ).    910(WVLS15).

VLS  910(WVLS15)

1_


) L


(UR U


 R


)L

2_


) (Rw


 F R F


)M




3_


) L


(UR U


 M


)x




 ?

1) 3)       .

  (UR U


R


) -,   .

    :  910, , , .

: -       910.

- L


(URU


R


) L  .      [2 -  R      ;  R


      .   L


 L,   .].     -    .     -.

:  910 .

   ,       HLS  401.

2)

3)

  ?

L


(R UR


U


)L




1.16 301(WVLS16)









 301(WVLS16)



      ,  .    () ,     ( ),   .    301(WVLS16)

VLS  301(WVLS16)

1_


) U2 L


 (R UR


U


) L (R U2R


)

2_


) UR


 D


(R UR


) D (R2 U2R


)= U R


D


(R UR


) D R (R U2R


)

3_


) U2 + (R U


 R


 U


) R


(F R U R U


 R


F


)

4_


) U2 (M x UR


 U


) L (R U2R


)= U2 M (x UR


U


) L (R U2R


)

 ?

1)    -    .

:     301    .

- L


(R UR


U


) L .     ,  ,     -.   .     -    .     -.

:  30 (30.1)      .

2) - R


D


(R UR


) D R   .

3)

4)

  ?

(R U2R


) L


(UR U


R


) LU2




1.17 401(WVLS17)









 401(WVLS17)



      ,  .    () ,     ( ),   .    401(WVLS17).

VLS  401(WVLS17)

1_


) (* R


 F


 R) (U2 R U2


 R


)F

2_


) UL


U(UR U


 R


) U2 L (UR U


 R


)= U L


U2 (R U


R


) U2 L (UR U


R


)

3_


) U2 (F2 L F2 L


) (U


 L


 UL)

 ?

1)  - (* R


F


R)  -  (F R


F


R),      .

 - (* R


F


R)  -.

 - (U2 R U2


R


)   .

:  401 ,         .

2)

3)  (U2 F2)    .

  ?

F


 (R U2 R


 U2) (R


 F R*)




1.18 400(WVLS18)









 400(WVLS18)



      ,  .    () ,     ( ),   .    400(WVLS18).

VLS  400(WVLS18)

1_


) U2 R U2


R




 ?

1) - (U2 R U2


R


)   .

:   400   .

:   400  .

     300,  ,        .

 :  400  ,   300  .

  ?

(R U2 R


U2


)




1.19 900(WVLS19)









 900(WVLS19)



      ,  .    () ,     ( ),   .    900(WVLS19).

VLS  900(WVLS19)

1_


) (R


 F2 R2 U


) (R


 U


 R U) R


F2= (R


F2 R *) (R U


R


U


) (R UR


F2) = (R


F2 R *) (R U


R


U


) (R UR


F


) F


= (R


F2 R2 U


R


U


) (R UR


F


)F




2_


) U2 L


 (UR U


R


) L (U


 R U


R


)

3_


) U+ R U


 (R D


 R U2 R


 D R) U2R

 ?

1)  - (R


F2 R *)  - (R


F2 R F


)      F


.     .

 - (R U


R


U


)    .

 - (R UR


F


)    .

:   900    (  )   .

 (R


F2 R2 U


R


U


) (R UR


F


) F


    T-Permutation ()   F    .

:   900     .

2)

3)    (https://jperm.net/algs/wv) (https://jperm.net/algs/wv (https://ridero.ru/link/ZQHd3rTDEk97Dq)). ,

  ?

(R UR


 U) L


 (R UR


U


) LU2




1.20 401(WVLS20)









 401(WVLS20)



         .    401(WVLS20).

VLS  401(WVLS20)

1_


) (UR U


R


) U


(R UR


 U) (R U2R


) = (UR U


R


) U


(R UR


UR U2R


)

2_


) U(L


 U2 L) (R UR


U) (L


 UL)

 ?

1)      -,  OLL  .

:  401    .

  (     311900)     .

:  311, 401900   .

  ?

(R U2R


U


 R U


 R


) U(R UR


U


)




1.21 900(WVLS21)









 900(WVLS21)



         .    900(WVLS21).




  .


   .

   ,     (https://www.litres.ru/pages/biblio_book/?art=55558881)  .

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notes








1


         (L


 UR),   .




2


 R      ;  R


      .   L


 L,   .


