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弌亳亠仄 亳仗亳亰舒亳亳 仍礆弍亟舒-亳亳仍亠仆亳

亠从亳 12. 亠从亳于仆亠 亳仗 亳 亳仗-仗亠亠亠亠仆亳

                亠仆亳 仂从于亳仆




                  22.05.2011

            CS Club 仗亳  




                                           1
亠从亳于仆亠 亳仗: 仗亠亟于舒亳亠仍仆亠 亰舒仄亠舒仆亳

丱仂亳仄 于 了 仂仗亠亟亠仍亳 仗亳从亳, 亟亠亠于 亳 仗.
亟亠: 仗亠亟亰舒亟舒仆仆亶 从仂仆亠从
 0  I :   , PAIR :       , INJL :    + , INJR :    + 
丐仂亞亟舒 从仂仆从仂 仗亳从舒
                  NIL  INJL I
                  NIL :     + ???   (= List)
              CONS e l  INJR (PAIR e l)
              CONS e l : ??? +   List   (= List)
仄亠亠仄 亠从亳于仆仂亠 舒于仆亠仆亳亠 仆舒 亳仗:
                      List    +   List
                      List  袖留. +   留
                                                                  2
亠从亳于仆亠 亳仗: 亳亠仄舒 了袖

舒亟舒 仂仆仂亠仆亳亠 从于亳于舒仍亠仆仆仂亳 仄亠亢亟 亳仗舒仄亳 

仍亳 M :  亳   , 仂 M : , 亳 仆舒仂弍仂仂.

舒仗亳仄亠, 亠从亳于仆亶 亳仗 0  0  0
                x : 0   x : 0  0
                x : 0   x x : 0
                         了x : 0. x x : 0  0
                         了x : 0. x x : 0
                         (了x : 0. x x) (了x : 0. x x) : 0
(仗仂亟仂亟亳 亟仍 亳仗亳亰舒亳亳 仍ミ頴笑覚 亠仄舒 M  )

仗亠舒仂 袖 亟仍 从仂仆亳仂于舒仆亳: 0  袖留. 留  留
                                                              3
C亳亠仄舒 了袖: 仂仄舒仍仆仂亳



              丐亠仄:       ::= V |   | 了V. 
               丐亳仗:      T ::= V | T  T | 袖V. T
仍   T 仂仗亠亟亠仍ム 亟亠亠于仂 亳仗舒 T ():
                              T (留) = 留
                         T (  ) =            

                                       T ()         T ()
                           T (袖留. 留) = 
          T (袖留. 袖硫1. . . . 袖硫n. 留) = 
                           T (袖留. ) = T ([留 := 袖留. ])

         亅从于亳于舒仍亠仆仆仂:               T () = T ()

                                                             4
C亳亠仄舒 了袖: 仗亳于舒亳于舒仆亳亠 亳仗仂于




                      (x : )  
(仆舒舒仍仆仂亠 仗舒于亳仍仂)
                        x:
                         M:          N:
(亟舒仍亠仆亳亠 )
                             (M N) : 

                       , x: M:
(于于亠亟亠仆亳亠 )
                       (了x. M) :   

                         M:    
(-仗舒于亳仍仂)
                            M:



                                                5
C亳亠仄舒 了袖: 仗亳仄亠



仍   袖留. 留  粒 亳仄亠亠仄 仗仂 仗舒于亳仍 T (袖留. ) = T ([留 := 袖留. ])
亟亠亠于仂

         T () =                  =                 

                   T ()       粒                        粒

                                                    粒

                                       ...       粒
亅从于亳于舒仍亠仆仆仂     粒 仍亠亟亠 仗仂 仂仗亠亟亠仍亠仆亳 亳亰 舒于亠仆-
于舒 亟亠亠于亠于.


                                                             6
C亳亠仄舒 了袖: 于仂亶于舒 仗仂亟舒仆仂于从亳


丕于亠亢亟亠仆亳亠. 仍 仍ミ英  于仗仂仍仆磳:

                         袖留.   [留 := 袖留. ]
仂从-于仂: 仍  = 袖硫1. . . . 袖硫n. 留 仍亠亟亠 亳亰

                      T (袖留. ) = T ([留 := 袖留. ])
仍亳 亢亠   袖硫1. . . . 袖硫n. 留, 仂 舒从 亳 舒从 .

亳仄亠:

        袖留. 留  粒  (袖留. 留  粒)  粒  ((袖留. 留  粒)  粒)  粒  . . .
        袖留. 留  留  (袖留. 留  留)  (袖留. 留  留)  . . .

                                                                  7
C亳亠仄舒 了袖: 仗亳仄亠  




仍   (袖留. 留  粒)  袖隆. 袖硫. 硫 亳仄亠亠仄 亟亠亠于仂

         T () =                  =                 

                   T ()                               

                                                    粒

                                       ...       粒
亟亠   袖留. 留  粒 亳 亳仗仂仍亰仂于舒仍仂 仗舒于亳仍仂 T (袖留. 留) = .



                                                             8
C亳亠仄舒 了袖: 亳仗亳亰亳亠仄 Y-从仂仄弍亳仆舒仂


舒仄仂亳仄 仗仂亳亰于仂仍仆亶 .
   袖留. 留  , 仂亞亟舒      亳

              Y  了f. (了x. f (x x))(了x. f (x x)) : (  )  

       x:                x:
       x:                xx : 
       f :   , x :    f (x x) : 
       f :             了x. f (x x) :   
       f :             了x. f (x x) : 
       f :             (了x. f (x x))(了x. f (x x)) : 
                          了f. (了x. f (x x))(了x. f (x x)) : (  )  


仂从舒亢亳亠, 仂 于 了袖 于亠仆仂   (了x. x x)(了x. x x) : 
                                                                         9
C亳亠仄舒 了袖: 亠亟从亳 弍亠从舒 亳 SN




丐亠仂亠仄舒 仂 亠亟从亳亳 弍亠从舒
 M 硫 N. 丐仂亞亟舒

                   了袖 M :      了袖 N : 


仂从仂仍从 于 亳亠仄亠 亳仗亳亰亳亠仄 于亠 亠仄 SN 仆亠 亳仄亠亠
仄亠舒.




                                                10
C亳亠仄舒 了袖: 仗仂弍仍亠仄 舒亰亠亳仄仂亳




丐 M : ?
舒亰亠亳仄舒. (弌仍亠亟亠 亳亰 舒亰亠亳仄仂亳 T () = T ())

弌丐 M : ?
丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 从舒亢亟亶 亠仄 亳仄亠亠 亳仗.

丐 ? : 
丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 于亠 亳仗 仆舒亠仍亠仆.



                                                     11
丐亳仗-仗亠亠亠亠仆亳



亟亠: 舒亰亠亳 亠仄 亳仄亠 亟于舒 亳仗舒  亳  仂亟仆仂于亠仄亠仆仆仂:

                              x:


亅仂 仗仂仂亢亟舒亠 仗亠亳舒仍仆亶 (ad hoc) 仗仂仍亳仄仂亳亰仄, 于
仂仍亳亳亠 仂 仗舒舒仄亠亳亠从仂亞仂 仗仂仍亳仄仂亳亰仄舒 了2.

舒 仄仆仂亢亠于亠 亳仗仂于 亰舒亟舒ム 仗亠亟仗仂磲仂从:
仍亳 M :  亳  , 仂 M : .

舒仗亳仄亠, x :    亳      , 仂从亟舒 x : .

                                                   12
弌亳亠仄舒 了: 仂仄舒仍仆仂亳



            丐亳仗:     T ::=     | V | TT | T  T
仗亠亟亠仍亠仆亳亠 仂仆仂亠仆亳         磦仍磳 仗仂亟亳仗仂仄
             (refl)    
           (trans)     ,     
             (incl)                  
              (glb)    ,       
                ( )   
             ( )            
              ( )   (  )  (   )     
                ()       ,         
仂亢仆仂 于于亠亳 从于亳于舒仍亠仆仆仂:                
                                                         13
弌亳亠仄舒 了: 于仂亶于舒




仂从仂仍从            亳     , 仂

                                
仂 亠   于亠       亳亠舒亳 仆亠 仗仂亟仆亳仄舒亠.

仂从舒亢亳亠, 仂

                 (  )  (  )      




                                                14
C亳亠仄舒 了: 仗亳于舒亳于舒仆亳亠 亳仗仂于


             ...                      ...

                                  M:  
             (亟舒仍亠仆亳亠 )
                                M:  M:
                                M:  M:
             (于于亠亟亠仆亳亠 )
                                  M:  

             (于于亠亟亠仆亳亠   )
                                     M:
                                M:       
             ( -仗舒于亳仍仂)
                                   M:


舒舒仍仆仂亠 仗舒于亳仍仂, 于于亠亟亠仆亳亠 亳 亟舒仍亠仆亳亠  仂仗亠仆.
                                                    15
C亳亠仄舒 了: 仗亳仄亠


仍 舒仄仂仗亳仄亠仆亠仆亳 了x. x x 亳仄亠亠仄
            x : (  )     x:
            x : (  )     x:
            x : (  )     xx : 
                              了x. x x : (  )    


亠于亳亟仆仂, 仂
                              :


丕于亠亢亟亠仆亳亠. 丐亠仄 M 仆亠 亳仄亠亠 亰舒亞仂仍仂于仂仆仂亶 NF 仂亞亟舒 亳
仂仍从仂 仂亞亟舒, 从仂亞亟舒 磦仍磳 亠亟亳仆于亠仆仆仄 亳仗仂仄 亟仍 M.

                                                          16
C亳亠仄舒 了: 从仂仆于亠亳 弍亠从舒



丐亠仂亠仄舒 仂 亠亟从亳亳 弍亠从舒
 M 硫 N. 丐仂亞亟舒

                  了 M :      了 N : 


仂仍亠亠 仂亞仂 亟仍 了, 于亠仆舒 亳
丐亠仂亠仄舒 仂 从仂仆于亠亳亳 弍亠从舒
 M=硫N. 丐仂亞亟舒

                  了 M :      了 N : 



                                             17
C亳亠仄舒 了: 从仗舒仆亳 弍亠从舒


 P  . . . x . . . x . . . x . . . 亳

                    P[x := Q] :            ...Q...Q...Q... : 
舒亢亟仂亠 于仂亢亟亠仆亳亠 Q 仄仂亢亠 亠弍仂于舒 于仂亠亞仂 亳仗舒 1, 2, 3
仂 仄 仄仂亢亠仄 仗亳仗亳舒 了x. P 亳仗 1  2  3  
丐仂 亠 硫-从仗舒仆亳 (了x. P) Q 仂亢亠 弍亟亠 亳仄亠 亳仗 .

仍亳 亢亠 于仂亢亟亠仆亳亶 x 于 P 仆亠,
仂 仄 仄仂亢亠仄 仗亳仗亳舒 了x. P 亳仗  
(仗仂亠 仗亠亠亠亠仆亳亠); 仆仂 仗仂-仗亠亢仆亠仄

                                       (了x. P) Q : 

                                                                  18
C亳亠仄舒 了: 从仗舒仆亳 弍亠从舒 (仗亳仄亠)

丱仂 S K        硫 K , 仆仂       了 S K : (  )    , 舒 K :     


 了 亳舒亳 仄仂亢仆仂 亳仗舒于亳:                       了 S K :     


 仂亠         亳仗舒 于 了 于 亠亟从亳亳 了g z. (了y. z) (g z) 硫 了g z. z

弌舒于仆亳仄 于于仂亟 于 了 亳 了:
[y : ]1 [z : ]2     [z : ]2 [g :   ]3       [y : ]1 [z : ]2 [g : ]3
                  1                                                         1
了y. z :                    gz :                   了y. z :               gz :
              (了y. z) (g z) :                             (了y. z) (g z) : 
                                            2                                       2
        了z. (了y. z) (g z) :                         了z. (了y. z) (g z) :   
                                              3                                       3
了g z. (了y. z) (g z) : (  )                   了g z. (了y. z) (g z) :     

                                                                                 19
C亳亠仄舒 了: SN




仂从仂仍从 于 亳亠仄亠 了 亳仗亳亰亳亠仄 于亠 亠仄 SN 仆亠 亳仄亠亠
仄亠舒.

亟仆舒从仂 亟仍 亳亠仄 了 (了 弍亠亰 亳仗仂于仂亶 从仂仆舒仆   ) 于亠仆舒
丐亠仂亠仄舒 [van Bakel, Krivine]

M 仄仂亢亠 弍 亳仗亳亰亳仂于舒仆 于 了  M 亳仍仆仂 仆仂仄舒仍亳亰亠仄




                                                     20
C亳亠仄舒 了: 仗仂弍仍亠仄 舒亰亠亳仄仂亳

丐 M : ?
亠舒亰亠亳仄舒. 了 I : 留  留, 仆亠仍仂亢仆仂 仗仂从舒亰舒, 仂   了 K :
留  留. 丐仂 亠 仄仆仂亢亠于仂

                   {M |   了 M : 留  留 }
仆亠亳于亳舒仍仆仂 亳 亰舒仄从仆仂 仂仆仂亳亠仍仆仂 =硫. 丐仂亞亟舒 仂仆仂 仆亠亠-
从亳于仆仂 (亠仂亠仄舒 弌从仂舒).

弌丐 M : ?
丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 从舒亢亟亶 亠仄 亳仄亠亠 亳仗 ( ).
(仍 了 仆亠舒亰亠亳仄舒, 亳亰-亰舒 从于亳于舒仍亠仆仆仂亳 SN)

丐 ? : 
亠舒亰亠亳仄舒. 仂从舒亰舒仍亳 于 从仂仆亠 1990-.
                                                    21
仂仄舒仆亠亠 亰舒亟舒仆亳亠




仂仂亶亠 亟亠亠于仂 亳仗舒 亟仍
     袖留. 留  留
     袖留. 留  留  留
     袖留. 留  粒  留
     袖留. 留  (袖硫. 硫  粒)

仂从舒亢亳亠, 仂 亟仍   (了x. x x)(了x. x x) 亳 仗仂亳亰于仂仍仆仂亞仂  于-
仗仂仍仆磳 了袖  : 



                                                         22
亳亠舒舒 (1)



LCWT 亞仍. 4
Henk Barendregt, Lambda calculi with types,
Handbook of logic in computer science (vol. 2), Oxford University
Press, 1993

TAPL 亞仍. 20,21
Benjamin C. Pierce, Types and Programming Languages, MIT
Press, 2002

http://www.cis.upenn.edu/~bcpierce/tapl


                                                           23
亳亠舒舒 (2)




ATTAPL 亞仍. 2
Benjamin C. Pierce, editor.
Advanced Topics in Types and Programming Languages, MIT,
2005




                                                   24

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  • 1. 弌亳亠仄 亳仗亳亰舒亳亳 仍礆弍亟舒-亳亳仍亠仆亳 亠从亳 12. 亠从亳于仆亠 亳仗 亳 亳仗-仗亠亠亠亠仆亳 亠仆亳 仂从于亳仆 22.05.2011 CS Club 仗亳 1
  • 2. 亠从亳于仆亠 亳仗: 仗亠亟于舒亳亠仍仆亠 亰舒仄亠舒仆亳 丱仂亳仄 于 了 仂仗亠亟亠仍亳 仗亳从亳, 亟亠亠于 亳 仗. 亟亠: 仗亠亟亰舒亟舒仆仆亶 从仂仆亠从 0 I : , PAIR : , INJL : + , INJR : + 丐仂亞亟舒 从仂仆从仂 仗亳从舒 NIL INJL I NIL : + ??? (= List) CONS e l INJR (PAIR e l) CONS e l : ??? + List (= List) 仄亠亠仄 亠从亳于仆仂亠 舒于仆亠仆亳亠 仆舒 亳仗: List + List List 袖留. + 留 2
  • 3. 亠从亳于仆亠 亳仗: 亳亠仄舒 了袖 舒亟舒 仂仆仂亠仆亳亠 从于亳于舒仍亠仆仆仂亳 仄亠亢亟 亳仗舒仄亳 仍亳 M : 亳 , 仂 M : , 亳 仆舒仂弍仂仂. 舒仗亳仄亠, 亠从亳于仆亶 亳仗 0 0 0 x : 0 x : 0 0 x : 0 x x : 0 了x : 0. x x : 0 0 了x : 0. x x : 0 (了x : 0. x x) (了x : 0. x x) : 0 (仗仂亟仂亟亳 亟仍 亳仗亳亰舒亳亳 仍ミ頴笑覚 亠仄舒 M ) 仗亠舒仂 袖 亟仍 从仂仆亳仂于舒仆亳: 0 袖留. 留 留 3
  • 4. C亳亠仄舒 了袖: 仂仄舒仍仆仂亳 丐亠仄: ::= V | | 了V. 丐亳仗: T ::= V | T T | 袖V. T 仍 T 仂仗亠亟亠仍ム 亟亠亠于仂 亳仗舒 T (): T (留) = 留 T ( ) = T () T () T (袖留. 留) = T (袖留. 袖硫1. . . . 袖硫n. 留) = T (袖留. ) = T ([留 := 袖留. ]) 亅从于亳于舒仍亠仆仆仂: T () = T () 4
  • 5. C亳亠仄舒 了袖: 仗亳于舒亳于舒仆亳亠 亳仗仂于 (x : ) (仆舒舒仍仆仂亠 仗舒于亳仍仂) x: M: N: (亟舒仍亠仆亳亠 ) (M N) : , x: M: (于于亠亟亠仆亳亠 ) (了x. M) : M: (-仗舒于亳仍仂) M: 5
  • 6. C亳亠仄舒 了袖: 仗亳仄亠 仍 袖留. 留 粒 亳仄亠亠仄 仗仂 仗舒于亳仍 T (袖留. ) = T ([留 := 袖留. ]) 亟亠亠于仂 T () = = T () 粒 粒 粒 ... 粒 亅从于亳于舒仍亠仆仆仂 粒 仍亠亟亠 仗仂 仂仗亠亟亠仍亠仆亳 亳亰 舒于亠仆- 于舒 亟亠亠于亠于. 6
  • 7. C亳亠仄舒 了袖: 于仂亶于舒 仗仂亟舒仆仂于从亳 丕于亠亢亟亠仆亳亠. 仍 仍ミ英 于仗仂仍仆磳: 袖留. [留 := 袖留. ] 仂从-于仂: 仍 = 袖硫1. . . . 袖硫n. 留 仍亠亟亠 亳亰 T (袖留. ) = T ([留 := 袖留. ]) 仍亳 亢亠 袖硫1. . . . 袖硫n. 留, 仂 舒从 亳 舒从 . 亳仄亠: 袖留. 留 粒 (袖留. 留 粒) 粒 ((袖留. 留 粒) 粒) 粒 . . . 袖留. 留 留 (袖留. 留 留) (袖留. 留 留) . . . 7
  • 8. C亳亠仄舒 了袖: 仗亳仄亠 仍 (袖留. 留 粒) 袖隆. 袖硫. 硫 亳仄亠亠仄 亟亠亠于仂 T () = = T () 粒 ... 粒 亟亠 袖留. 留 粒 亳 亳仗仂仍亰仂于舒仍仂 仗舒于亳仍仂 T (袖留. 留) = . 8
  • 9. C亳亠仄舒 了袖: 亳仗亳亰亳亠仄 Y-从仂仄弍亳仆舒仂 舒仄仂亳仄 仗仂亳亰于仂仍仆亶 . 袖留. 留 , 仂亞亟舒 亳 Y 了f. (了x. f (x x))(了x. f (x x)) : ( ) x: x: x: xx : f : , x : f (x x) : f : 了x. f (x x) : f : 了x. f (x x) : f : (了x. f (x x))(了x. f (x x)) : 了f. (了x. f (x x))(了x. f (x x)) : ( ) 仂从舒亢亳亠, 仂 于 了袖 于亠仆仂 (了x. x x)(了x. x x) : 9
  • 10. C亳亠仄舒 了袖: 亠亟从亳 弍亠从舒 亳 SN 丐亠仂亠仄舒 仂 亠亟从亳亳 弍亠从舒 M 硫 N. 丐仂亞亟舒 了袖 M : 了袖 N : 仂从仂仍从 于 亳亠仄亠 亳仗亳亰亳亠仄 于亠 亠仄 SN 仆亠 亳仄亠亠 仄亠舒. 10
  • 11. C亳亠仄舒 了袖: 仗仂弍仍亠仄 舒亰亠亳仄仂亳 丐 M : ? 舒亰亠亳仄舒. (弌仍亠亟亠 亳亰 舒亰亠亳仄仂亳 T () = T ()) 弌丐 M : ? 丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 从舒亢亟亶 亠仄 亳仄亠亠 亳仗. 丐 ? : 丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 于亠 亳仗 仆舒亠仍亠仆. 11
  • 12. 丐亳仗-仗亠亠亠亠仆亳 亟亠: 舒亰亠亳 亠仄 亳仄亠 亟于舒 亳仗舒 亳 仂亟仆仂于亠仄亠仆仆仂: x: 亅仂 仗仂仂亢亟舒亠 仗亠亳舒仍仆亶 (ad hoc) 仗仂仍亳仄仂亳亰仄, 于 仂仍亳亳亠 仂 仗舒舒仄亠亳亠从仂亞仂 仗仂仍亳仄仂亳亰仄舒 了2. 舒 仄仆仂亢亠于亠 亳仗仂于 亰舒亟舒ム 仗亠亟仗仂磲仂从: 仍亳 M : 亳 , 仂 M : . 舒仗亳仄亠, x : 亳 , 仂从亟舒 x : . 12
  • 13. 弌亳亠仄舒 了: 仂仄舒仍仆仂亳 丐亳仗: T ::= | V | TT | T T 仗亠亟亠仍亠仆亳亠 仂仆仂亠仆亳 磦仍磳 仗仂亟亳仗仂仄 (refl) (trans) , (incl) (glb) , ( ) ( ) ( ) ( ) ( ) () , 仂亢仆仂 于于亠亳 从于亳于舒仍亠仆仆仂: 13
  • 14. 弌亳亠仄舒 了: 于仂亶于舒 仂从仂仍从 亳 , 仂 仂 亠 于亠 亳亠舒亳 仆亠 仗仂亟仆亳仄舒亠. 仂从舒亢亳亠, 仂 ( ) ( ) 14
  • 15. C亳亠仄舒 了: 仗亳于舒亳于舒仆亳亠 亳仗仂于 ... ... M: (亟舒仍亠仆亳亠 ) M: M: M: M: (于于亠亟亠仆亳亠 ) M: (于于亠亟亠仆亳亠 ) M: M: ( -仗舒于亳仍仂) M: 舒舒仍仆仂亠 仗舒于亳仍仂, 于于亠亟亠仆亳亠 亳 亟舒仍亠仆亳亠 仂仗亠仆. 15
  • 16. C亳亠仄舒 了: 仗亳仄亠 仍 舒仄仂仗亳仄亠仆亠仆亳 了x. x x 亳仄亠亠仄 x : ( ) x: x : ( ) x: x : ( ) xx : 了x. x x : ( ) 亠于亳亟仆仂, 仂 : 丕于亠亢亟亠仆亳亠. 丐亠仄 M 仆亠 亳仄亠亠 亰舒亞仂仍仂于仂仆仂亶 NF 仂亞亟舒 亳 仂仍从仂 仂亞亟舒, 从仂亞亟舒 磦仍磳 亠亟亳仆于亠仆仆仄 亳仗仂仄 亟仍 M. 16
  • 17. C亳亠仄舒 了: 从仂仆于亠亳 弍亠从舒 丐亠仂亠仄舒 仂 亠亟从亳亳 弍亠从舒 M 硫 N. 丐仂亞亟舒 了 M : 了 N : 仂仍亠亠 仂亞仂 亟仍 了, 于亠仆舒 亳 丐亠仂亠仄舒 仂 从仂仆于亠亳亳 弍亠从舒 M=硫N. 丐仂亞亟舒 了 M : 了 N : 17
  • 18. C亳亠仄舒 了: 从仗舒仆亳 弍亠从舒 P . . . x . . . x . . . x . . . 亳 P[x := Q] : ...Q...Q...Q... : 舒亢亟仂亠 于仂亢亟亠仆亳亠 Q 仄仂亢亠 亠弍仂于舒 于仂亠亞仂 亳仗舒 1, 2, 3 仂 仄 仄仂亢亠仄 仗亳仗亳舒 了x. P 亳仗 1 2 3 丐仂 亠 硫-从仗舒仆亳 (了x. P) Q 仂亢亠 弍亟亠 亳仄亠 亳仗 . 仍亳 亢亠 于仂亢亟亠仆亳亶 x 于 P 仆亠, 仂 仄 仄仂亢亠仄 仗亳仗亳舒 了x. P 亳仗 (仗仂亠 仗亠亠亠亠仆亳亠); 仆仂 仗仂-仗亠亢仆亠仄 (了x. P) Q : 18
  • 19. C亳亠仄舒 了: 从仗舒仆亳 弍亠从舒 (仗亳仄亠) 丱仂 S K 硫 K , 仆仂 了 S K : ( ) , 舒 K : 了 亳舒亳 仄仂亢仆仂 亳仗舒于亳: 了 S K : 仂亠 亳仗舒 于 了 于 亠亟从亳亳 了g z. (了y. z) (g z) 硫 了g z. z 弌舒于仆亳仄 于于仂亟 于 了 亳 了: [y : ]1 [z : ]2 [z : ]2 [g : ]3 [y : ]1 [z : ]2 [g : ]3 1 1 了y. z : gz : 了y. z : gz : (了y. z) (g z) : (了y. z) (g z) : 2 2 了z. (了y. z) (g z) : 了z. (了y. z) (g z) : 3 3 了g z. (了y. z) (g z) : ( ) 了g z. (了y. z) (g z) : 19
  • 20. C亳亠仄舒 了: SN 仂从仂仍从 于 亳亠仄亠 了 亳仗亳亰亳亠仄 于亠 亠仄 SN 仆亠 亳仄亠亠 仄亠舒. 亟仆舒从仂 亟仍 亳亠仄 了 (了 弍亠亰 亳仗仂于仂亶 从仂仆舒仆 ) 于亠仆舒 丐亠仂亠仄舒 [van Bakel, Krivine] M 仄仂亢亠 弍 亳仗亳亰亳仂于舒仆 于 了 M 亳仍仆仂 仆仂仄舒仍亳亰亠仄 20
  • 21. C亳亠仄舒 了: 仗仂弍仍亠仄 舒亰亠亳仄仂亳 丐 M : ? 亠舒亰亠亳仄舒. 了 I : 留 留, 仆亠仍仂亢仆仂 仗仂从舒亰舒, 仂 了 K : 留 留. 丐仂 亠 仄仆仂亢亠于仂 {M | 了 M : 留 留 } 仆亠亳于亳舒仍仆仂 亳 亰舒仄从仆仂 仂仆仂亳亠仍仆仂 =硫. 丐仂亞亟舒 仂仆仂 仆亠亠- 从亳于仆仂 (亠仂亠仄舒 弌从仂舒). 弌丐 M : ? 丐亳于亳舒仍仆仂 舒亰亠亳仄舒: 从舒亢亟亶 亠仄 亳仄亠亠 亳仗 ( ). (仍 了 仆亠舒亰亠亳仄舒, 亳亰-亰舒 从于亳于舒仍亠仆仆仂亳 SN) 丐 ? : 亠舒亰亠亳仄舒. 仂从舒亰舒仍亳 于 从仂仆亠 1990-. 21
  • 22. 仂仄舒仆亠亠 亰舒亟舒仆亳亠 仂仂亶亠 亟亠亠于仂 亳仗舒 亟仍 袖留. 留 留 袖留. 留 留 留 袖留. 留 粒 留 袖留. 留 (袖硫. 硫 粒) 仂从舒亢亳亠, 仂 亟仍 (了x. x x)(了x. x x) 亳 仗仂亳亰于仂仍仆仂亞仂 于- 仗仂仍仆磳 了袖 : 22
  • 23. 亳亠舒舒 (1) LCWT 亞仍. 4 Henk Barendregt, Lambda calculi with types, Handbook of logic in computer science (vol. 2), Oxford University Press, 1993 TAPL 亞仍. 20,21 Benjamin C. Pierce, Types and Programming Languages, MIT Press, 2002 http://www.cis.upenn.edu/~bcpierce/tapl 23
  • 24. 亳亠舒舒 (2) ATTAPL 亞仍. 2 Benjamin C. Pierce, editor. Advanced Topics in Types and Programming Languages, MIT, 2005 24