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  4640  tfrcllemsucfn  6449  sbthlemi6  7076  sbthlemi8  7078  div32apd  8900  div13apd  8901  expdivapd  10845  swrdsbslen  11133  modfsummodlemstep  11818  pcqmul  12676  pcid  12697  pcneg  12698  pc2dvds  12703  pcz  12705  pcaddlem  12712  pcadd  12713  pcmpt2  12717  pcbc  12724  qexpz  12725  expnprm  12726  ennnfonelemg  12824  ssblex  14953