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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  5903  4bc2eq6  11236  halfleoddlt  12687  ballotfilemonn  13280  strleun  13518  strle1g  13520  slotstnscsi  13609  slotsdnscsi  13637  slotsdifunifndx  13646  2irrexpqap  16226  lgslem2  16337  lgsdir2lem2  16365  lgsdir2lem3  16366  usgrexmpldifpr  16707  0grsubgr  16722  konigsberglem4  16949  konigsberglem5  16950  ex-dvds  16961  nconstwlpolem0  17332
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