Theorem syl121anc 1255

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 1250	1 ⊢ (𝜑 → 𝜂)

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 981

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 983

This theorem is referenced by:  syl122anc  1259  tfisi  4654  tfrcllemsucfn  6464  sbthlemi6  7092  sbthlemi8  7094  div32apd  8924  div13apd  8925  expdivapd  10871  swrdsbslen  11159  modfsummodlemstep  11929  pcqmul  12787  pcid  12808  pcneg  12809  pc2dvds  12814  pcz  12816  pcaddlem  12823  pcadd  12824  pcmpt2  12828  pcbc  12835  qexpz  12836  expnprm  12837  ennnfonelemg  12935  ssblex  15064