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Theorem sylanb 344
Description: A syllogism inference.
Hypotheses
Ref Expression
sylan.1 ((φψ) → χ)
sylanb.2 (θφ)
Assertion
Ref Expression
sylanb ((θψ) → χ)

Proof of Theorem sylanb
StepHypRef Expression
1 sylan.1 . 2 ((φψ) → χ)
2 sylanb.2 . . 3 (θφ)
32biimp 133 . 2 (θφ)
41, 3sylan 343 1 ((θψ) → χ)
Colors of variables: wff set class
Syntax hints:   → wi 2   ↔ wb 127   ∧ wa 196
This theorem is referenced by:  syl2anb 350  2euex 1061  2exeu 1066  sspsstr 1575  moop2 1910  ordon 2238  ordsucss 2320  ordsucelsuc 2324  fssres 2764  tz7.48lem 2993  nnmsucr 3182  erref 3212  mapxpen 3390  php 3409  php3 3411  php4 3412  omsucdom 3418  isfinite2 3437  aceq5lem4 3561  axsup 4088  divdivdivt 4265  uzind 4603  nnwo 4607  ruclem13 4897  occllem6 5185  spanun 5450  5oalem3 5546  5oalem5 5548
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6
This theorem depends on definitions:  df-bi 128  df-an 198
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