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Theorem ecased 944
Description: Deduction for elimination by cases. (Contributed by NM, 8-Oct-2012.)
Hypotheses
Ref Expression
ecased.1
ecased.2
ecased.3
Assertion
Ref Expression
ecased

Proof of Theorem ecased
StepHypRef Expression
1 ecased.1 . 2
2 ecased.2 . 2
3 pm3.11 499 . . 3
4 ecased.3 . . 3
53, 4syl5 32 . 2
61, 2, 5ecase3d 943 1
Colors of variables: wff setvar class
Syntax hints:  -.wn 3  ->wi 4  \/wo 368  /\wa 369
This theorem is referenced by:  ecase3ad  945  itgsplitioo  22244  rolle  22391  dalaw  35610
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-or 370  df-an 371
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