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first constructions with classes
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14
15 include "preamble.ma".
16
17 (* APPLICATIONS *******************************************************)
18
19 definition u0_i: ∀T:Type[0]. T → T ≝
20                  λT,a. a.
21
22 definition u0_k: ∀T,U:Type[0]. T → U → T ≝
23                  λT,U,a,b. a.
24
25 definition u0_s: ∀T,U1,U2:Type[0]. (T → U1 → U2) → (T → U1) → (T → U2) ≝
26                  λT,U1,U2,f,g,a. f a (g a).