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Theorem ibibr 343
Description: Implication in terms of implication and biconditional. (Contributed by NM, 29-Apr-2005.) (Proof shortened by Wolf Lammen, 21-Dec-2013.)
Assertion
Ref Expression
ibibr

Proof of Theorem ibibr
StepHypRef Expression
1 pm5.501 341 . . 3
2 bicom 200 . . 3
31, 2syl6bb 261 . 2
43pm5.74i 245 1
Colors of variables: wff setvar class
Syntax hints:  ->wi 4  <->wb 184
This theorem is referenced by:  tbt  344  rabxfrd  4673  ufileu  20420  abnotbtaxb  32111
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
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