Theorem pm2.01da 442

Description: Deduction based on reductio ad absurdum. (Contributed by Mario Carneiro, 9-Feb-2017.)

Hypothesis

Ref	Expression
pm2.01da.1

Assertion

Ref	Expression
pm2.01da

Proof of Theorem pm2.01da

Step	Hyp	Ref	Expression
1		pm2.01da.1	. . 3
2	1	ex 434	. 2
3	2	pm2.01d 169	1

Syntax hints:  -.wn 3  ->wi 4  /\wa 369

This theorem is referenced by:  efrirr  4865  omlimcl  7246  hartogslem1  7988  cfslb2n  8669  fin23lem41  8753  tskuni  9182  4sqlem18  14480  ramlb  14537  ivthlem2  21864  ivthlem3  21865  cosne0  22917  footne  24097

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 185  df-an 371