Nuprl Lemma : contrapos_elim
(
P:
. (
P 
 (
P))) ![](../FONT/eq.png)
 (
P,Q:
.  (
((![](../FONT/not.png)
Q) ![](../FONT/eq.png)
 (![](../FONT/not.png)
P)) ![](../FONT/eq.png)
 (
P) ![](../FONT/eq.png)
 (
Q)))
Proof not projected
Error : references
(\mforall{}P:\mBbbP{}.  (\mdownarrow{}P  \mvee{}  (\mneg{}P)))  {}\mRightarrow{}  (\mforall{}P,Q:\mBbbP{}.    (\mdownarrow{}((\mneg{}\mdownarrow{}Q)  {}\mRightarrow{}  (\mneg{}\mdownarrow{}P))  {}\mRightarrow{}  (\mdownarrow{}P)  {}\mRightarrow{}  (\mdownarrow{}Q)))
Date html generated:
2013_03_20-AM-11_02_10
Last ObjectModification:
2013_02_25-PM-04_45_25
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