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Theorem 3pm3.2i 1206
Description: Infer conjunction of premises. (Contributed by NM, 10-Feb-1995.)
Hypotheses
Ref Expression
3pm3.2i.1 𝜑
3pm3.2i.2 𝜓
3pm3.2i.3 𝜒
Assertion
Ref Expression
3pm3.2i (𝜑 ∧ 𝜓 ∧ 𝜒)

Proof of Theorem 3pm3.2i
StepHypRef Expression
1 3pm3.2i.1 . . 3 𝜑
2 3pm3.2i.2 . . 3 𝜓
31, 2pm3.2i 272 . 2 (𝜑 ∧ 𝜓)
4 3pm3.2i.3 . 2 𝜒
5 df-3an 1011 . 2 ((𝜑 ∧ 𝜓 ∧ 𝜒) ↔ ((𝜑 ∧ 𝜓) ∧ 𝜒))
63, 4, 5mpbir2an 955 1 (𝜑 ∧ 𝜓 ∧ 𝜒)
Colors of variables:    wff set class
This proof depends on syntax axioms:   ∧ wa 104   ∧ w3a 1009
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108
This proof depends on definitions:  df-bi 117  df-3an 1011
This theorem is used by:  mpbir3an  1210  3jaoi  1344  ftp  5900  4bc2eq6  11229  halfleoddlt  12680  ballotfilemonn  13273  strleun  13511  strle1g  13513  slotstnscsi  13602  slotsdnscsi  13630  slotsdifunifndx  13639  2irrexpqap  16180  lgslem2  16291  lgsdir2lem2  16319  lgsdir2lem3  16320  usgrexmpldifpr  16661  0grsubgr  16676  konigsberglem4  16903  konigsberglem5  16904  ex-dvds  16915  nconstwlpolem0  17285
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