Theorem 3jaoi 1314

Description: Disjunction of 3 antecedents (inference). (Contributed by NM, 12-Sep-1995.)

Hypotheses

Ref	Expression
3jaoi.1	|- ( ph -> ps )
3jaoi.2	|- ( ch -> ps )
3jaoi.3	|- ( th -> ps )

Assertion

Ref	Expression
3jaoi	|- ( ( ph \/ ch \/ th ) -> ps )

Proof of Theorem 3jaoi

Step	Hyp	Ref	Expression
1		3jaoi.1	. . 3 |- ( ph -> ps )
2		3jaoi.2	. . 3 |- ( ch -> ps )
3		3jaoi.3	. . 3 |- ( th -> ps )
4	1, 2, 3	3pm3.2i 1177	. 2 |- ( ( ph -> ps ) /\ ( ch -> ps ) /\ ( th -> ps ) )
5		3jao 1312	. 2 |- ( ( ( ph -> ps ) /\ ( ch -> ps ) /\ ( th -> ps ) ) -> ( ( ph \/ ch \/ th ) -> ps ) )
6	4, 5	ax-mp 5	1 |- ( ( ph \/ ch \/ th ) -> ps )

Syntax hints:   -> wi 4   \/ w3o 979   /\ w3a 980

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 710

This theorem depends on definitions:  df-bi 117  df-3or 981  df-3an 982

This theorem is referenced by:  3jaoian  1316  3ianorr  1320  acexmidlem1  5921  nndceq  6566  nndcel  6567  znegcl  9376  xrltnr  9873  nltpnft  9908  ngtmnft  9911  xrrebnd  9913  xnegcl  9926  xnegneg  9927  xltnegi  9929  xrpnfdc  9936  xrmnfdc  9937  xnegid  9953  xaddid1  9956  xposdif  9976  prm23lt5  12459  zabsle1  15348  gausslemma2dlem0f  15403  gausslemma2dlem0i  15406  2lgsoddprm  15462