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Theorem 3jaoi 1344
Description: Disjunction of 3 antecedents (inference). (Contributed by NM, 12-Sep-1995.)
Hypotheses
Ref Expression
3jaoi.1 (𝜑 → 𝜓)
3jaoi.2 (𝜒 → 𝜓)
3jaoi.3 (𝜃 → 𝜓)
Assertion
Ref Expression
3jaoi ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓)

Proof of Theorem 3jaoi
StepHypRef Expression
1 3jaoi.1 . . 3 (𝜑 → 𝜓)
2 3jaoi.2 . . 3 (𝜒 → 𝜓)
3 3jaoi.3 . . 3 (𝜃 → 𝜓)
41, 2, 33pm3.2i 1206 . 2 ((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓))
5 3jao 1342 . 2 (((𝜑 → 𝜓) ∧ (𝜒 → 𝜓) ∧ (𝜃 → 𝜓)) → ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓))
64, 5ax-mp 5 1 ((𝜑 ∨ 𝜒 ∨ 𝜃) → 𝜓)
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   ∨ w3o 1008   ∧ 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  ax-io 721
This proof depends on definitions:  df-bi 117  df-3or 1010  df-3an 1011
This theorem is used by:  3jaoian  1346  3ianorr  1350  acexmidlem1  6081  nndceq  6772  nndcel  6773  znegcl  9680  xrltnr  10192  nltpnft  10227  ngtmnft  10230  xrrebnd  10232  xnegcl  10245  xnegneg  10246  xltnegi  10248  xrpnfdc  10255  xrmnfdc  10256  xnegid  10272  xaddid1  10275  xposdif  10295  prm23lt5  13065  ppiublem1  16252  zabsle1  16284  gausslemma2dlem0f  16339  gausslemma2dlem0i  16342  2lgsoddprm  16398
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