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Combinatory logic


 

:This article is about a topic in mathematical logic and theoretical computer science, and is not to be confused with combinatorial logic, a topic in electronics.

T]

~ Table of Content ~

Introduction
Combinatory logic in mathematics
Combinatory logic in computing
Summary of the lambda calculus
Combinatory calculi
:T] (by 5)
(S λx.E1 λx.E2 a)
((S λx.E1 λx.E2) a)
...
(S (K (S I)) T)
(S (K (S I)) K) (by η-reduction)
(K (S I) x (K x) y)
(S I (K x) y)
(I y (K x y))
(y (K x y))
(y x)
T]
T x)] (by rule 7)
T
(C I) (η-reduction)
C*(traditional canonical notation : X* X I)
I'(traditional canonical notation: X' C X)
(I y x)
(I (S I I) (I (S I I)))
(S I I (I (S I I)))
(S I I (S I I))
(I Z (I Z))
(Z (I Z))
(Z Z)
(C (C (B N (S I I)) Ω) I Z) (definition of Z)
(C (B N (S I I)) Ω Z I)
(B N (S I I) Z Ω I)
(N (S I I Z) Ω I)
(K Ω I) (definition of N)
Ω
(K I Ω I) (definition of N)
(I I)

 

 

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