Theorem pm2.24 79

Description: Theorem *2.24 of [WhiteheadRussell] p. 104.

Assertion

Ref	Expression
pm2.24	|- (ph -> (-. ph -> ps))

Proof of Theorem pm2.24

Step	Hyp	Ref	Expression
1		pm2.21 76	. 2 |- (-. ph -> (ph -> ps))
2	1	com12 11	1 |- (ph -> (-. ph -> ps))

Syntax hints:  -. wn 2   -> wi 3

This theorem is referenced by:  pm4.81 163  oridm 243  orc 269  pm5.63 346  pm2.8 578  pm2.82 580  dedlema 764  prlem1 772  axpowndlem1 4961  ltlent 5534  ioojoint 6417

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7

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