Theorem syl121anc 1279

Description: Syllogism combined with contraction. (Contributed by NM, 11-Mar-2012.)

Hypotheses

Ref	Expression
sylXanc.1	⊢ (𝜑 → 𝜓)
sylXanc.2	⊢ (𝜑 → 𝜒)
sylXanc.3	⊢ (𝜑 → 𝜃)
sylXanc.4	⊢ (𝜑 → 𝜏)
syl121anc.5	⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃) ∧ 𝜏) → 𝜂)

Assertion

Ref	Expression
syl121anc	⊢ (𝜑 → 𝜂)

Proof of Theorem syl121anc

Step	Hyp	Ref	Expression
1		sylXanc.1	. 2 ⊢ (𝜑 → 𝜓)
2		sylXanc.2	. . 3 ⊢ (𝜑 → 𝜒)
3		sylXanc.3	. . 3 ⊢ (𝜑 → 𝜃)
4	2, 3	jca 306	. 2 ⊢ (𝜑 → (𝜒 ∧ 𝜃))
5		sylXanc.4	. 2 ⊢ (𝜑 → 𝜏)
6		syl121anc.5	. 2 ⊢ ((𝜓 ∧ (𝜒 ∧ 𝜃) ∧ 𝜏) → 𝜂)
7	1, 4, 5, 6	syl3anc 1274	1 ⊢ (𝜑 → 𝜂)

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 1005

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

This theorem depends on definitions:  df-bi 117  df-3an 1007

This theorem is referenced by:  syl122anc  1283  tfisi  4714  tfrcllemsucfn  6597  sbthlemi6  7245  sbthlemi8  7247  div32apd  9108  div13apd  9109  expdivapd  11077  swrdsbslen  11386  modfsummodlemstep  12172  pcqmul  13030  pcid  13051  pcneg  13052  pc2dvds  13057  pcz  13059  pcaddlem  13066  pcadd  13067  pcmpt2  13071  pcbc  13078  qexpz  13079  expnprm  13080  ennnfonelemg  13242  ssblex  15426  depind  16634