Nuprl Lemma : TR7a

[T:Type].

[P:T

].

[C:

]. (((

x:T. (P x))

C)

(

x:T. ((P x)

C)))

Proof

Definitions occuring in Statement : uall:

[x:A]. B[x], prop:

, exists:

x:A. B[x], implies: P

Q, and: P

Q, apply: f a, function: x:A

B[x], universe: Type
Definitions : implies: P

Q, member: t

T, prop:

, and: P

Q, so_lambda:

x.t[x], exists:

x:A. B[x], subtype_rel: A

r B, uall:

[x:A]. B[x], so_apply: x[s]
Lemmas : exists_wf
\mforall{}[T:Type]. \mforall{}[P:T {}\mrightarrow{} \mBbbP{}]. \mforall{}[C:\mBbbP{}]. (((\mexists{}x:T. (P x)) \mwedge{} C) {}\mRightarrow{} (\mexists{}x:T. ((P x) \mwedge{} C))) Date html generated: 2014_07_17-AM-09_55_49 Last ObjectModification: 2014_06_19-AM-10_03_00 Home Index