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Mirrors > Home > ILE Home > Th. List > syl21anc | GIF version |
Description: Syllogism combined with contraction. (Contributed by Jeff Hankins, 1-Aug-2009.) |
Ref | Expression |
---|---|
sylXanc.1 | ⊢ (𝜑 → 𝜓) |
sylXanc.2 | ⊢ (𝜑 → 𝜒) |
sylXanc.3 | ⊢ (𝜑 → 𝜃) |
syl21anc.4 | ⊢ (((𝜓 ∧ 𝜒) ∧ 𝜃) → 𝜏) |
Ref | Expression |
---|---|
syl21anc | ⊢ (𝜑 → 𝜏) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylXanc.1 | . . 3 ⊢ (𝜑 → 𝜓) | |
2 | sylXanc.2 | . . 3 ⊢ (𝜑 → 𝜒) | |
3 | sylXanc.3 | . . 3 ⊢ (𝜑 → 𝜃) | |
4 | 1, 2, 3 | jca31 307 | . 2 ⊢ (𝜑 → ((𝜓 ∧ 𝜒) ∧ 𝜃)) |
5 | syl21anc.4 | . 2 ⊢ (((𝜓 ∧ 𝜒) ∧ 𝜃) → 𝜏) | |
6 | 4, 5 | syl 14 | 1 ⊢ (𝜑 → 𝜏) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia3 107 |
This theorem is referenced by: issod 4241 brcogw 4708 funprg 5173 funtpg 5174 fnunsn 5230 ftpg 5604 fsnunf 5620 isotr 5717 off 5994 caofrss 6006 tfr1onlembxssdm 6240 tfrcllembxssdm 6253 pmresg 6570 ac6sfi 6792 tridc 6793 fidcenumlemrks 6841 sbthlemi8 6852 casefun 6970 caseinj 6974 djufun 6989 djuinj 6991 mulclpi 7136 archnqq 7225 addlocprlemlt 7339 addlocprlemeq 7341 addlocprlemgt 7342 mullocprlem 7378 apreim 8365 subrecap 8598 ltrec1 8646 divge0d 9524 fseq1p1m1 9874 q2submod 10158 seq3caopr2 10255 seq3distr 10286 facavg 10492 shftfibg 10592 sqrtdiv 10814 sqrtdivd 10940 mulcn2 11081 demoivreALT 11480 dvdslegcd 11653 gcdnncl 11656 qredeu 11778 rpdvds 11780 rpexp 11831 oddpwdclemodd 11850 divnumden 11874 divdenle 11875 phimullem 11901 setsfun 11994 setsfun0 11995 strleund 12047 comet 12668 fsumcncntop 12725 mulcncf 12760 trilpo 13236 |
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