Theorem syl3c 63

Description: A syllogism inference combined with contraction. (Contributed by Alan Sare, 7-Jul-2011.)

Hypotheses

Ref	Expression
syl3c.1	⊢ (𝜑 → 𝜓)
syl3c.2	⊢ (𝜑 → 𝜒)
syl3c.3	⊢ (𝜑 → 𝜃)
syl3c.4	⊢ (𝜓 → (𝜒 → (𝜃 → 𝜏)))

Assertion

Ref	Expression
syl3c	⊢ (𝜑 → 𝜏)

Proof of Theorem syl3c

Step	Hyp	Ref	Expression
1		syl3c.3	. 2 ⊢ (𝜑 → 𝜃)
2		syl3c.1	. . 3 ⊢ (𝜑 → 𝜓)
3		syl3c.2	. . 3 ⊢ (𝜑 → 𝜒)
4		syl3c.4	. . 3 ⊢ (𝜓 → (𝜒 → (𝜃 → 𝜏)))
5	2, 3, 4	sylc 62	. 2 ⊢ (𝜑 → (𝜃 → 𝜏))
6	1, 5	mpd 13	1 ⊢ (𝜑 → 𝜏)

Syntax hints:   → wi 4

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7

This theorem is referenced by:  bilukdc  1445  disjiun  4123  tfrlem1  6573  tfrcl  6629  mkvprop  7492  ccfunen  7624  caucvgprprlemval  8049  suplocsrlem  8169  peano5uzti  9737  seqf1oglem2  10940  zfz1iso  11276  wrd2ind  11478  lcmneg  12835  prmind2  12881  pcfac  13112  cnmpt12  15371  cnmpt22  15378  limccnp2lem  15760  2sqlem6  16222  2sqlem8  16225  gropd  16271  grstructd2dom  16272  sbthom  17045