Theorem syl121anc 1253

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 1248	1 ⊢ (𝜑 → 𝜂)

Syntax hints:   → wi 4   ∧ wa 104   ∧ w3a 979

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 981

This theorem is referenced by:  syl122anc  1257  tfisi  4598  tfrcllemsucfn  6368  sbthlemi6  6975  sbthlemi8  6977  div32apd  8785  div13apd  8786  expdivapd  10682  modfsummodlemstep  11479  pcqmul  12317  pcid  12337  pcneg  12338  pc2dvds  12343  pcz  12345  pcaddlem  12352  pcadd  12353  pcmpt2  12356  pcbc  12363  qexpz  12364  expnprm  12365  ennnfonelemg  12418  ssblex  14227