Nuprl Lemma : implies_antisymmetry
13,42
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P
,
Q
:
. (
P
Q
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(
Q
P
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(
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Q
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core
2
Definitions
t
T
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P
Q
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P
&
Q
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P
Q
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P
Q
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x
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.
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origin
P, Q:
. (P 
Q) (Q P) (P 
Q) P, Q:. (P Q) (Q P) (P Q) 
T Q Q Qx:A. B(x)