Nuprl Lemma : excluded-middle-lower-level

(P:'. (P  (P)))  (P:. (P  (P)))


Proof




Definitions occuring in Statement :  prop: all: x:A. B[x] not: A squash: T implies: P  Q or: P  Q
Definitions :  implies: P  Q all: x:A. B[x] prop: squash: T true: True member: t  T so_lambda: x.t[x] uall: [x:A]. B[x] so_apply: x[s] guard: {T}
Lemmas :  all_wf squash_wf or_wf not_wf
(\mforall{}P:\mBbbP{}'.  (\mdownarrow{}P  \mvee{}  (\mneg{}P)))  {}\mRightarrow{}  (\mforall{}P:\mBbbP{}.  (\mdownarrow{}P  \mvee{}  (\mneg{}P)))


Date html generated: 2013_03_20-AM-10_49_18
Last ObjectModification: 2013_02_25-PM-05_38_16

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