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| Mirrors > Home > ILE Home > Th. List > syl2anb | GIF version | ||
| Description: A double syllogism inference. (Contributed by NM, 29-Jul-1999.) |
| Ref | Expression |
|---|---|
| syl2anb.1 | ⊢ (𝜑 ↔ 𝜓) |
| syl2anb.2 | ⊢ (𝜏 ↔ 𝜒) |
| syl2anb.3 | ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
| Ref | Expression |
|---|---|
| syl2anb | ⊢ ((𝜑 ∧ 𝜏) → 𝜃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syl2anb.2 | . 2 ⊢ (𝜏 ↔ 𝜒) | |
| 2 | syl2anb.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
| 3 | syl2anb.3 | . . 3 ⊢ ((𝜓 ∧ 𝜒) → 𝜃) | |
| 4 | 2, 3 | sylanb 284 | . 2 ⊢ ((𝜑 ∧ 𝜒) → 𝜃) |
| 5 | 1, 4 | sylan2b 287 | 1 ⊢ ((𝜑 ∧ 𝜏) → 𝜃) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 |
| 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 |
| This theorem is referenced by: sylancb 422 stdcndc 857 reupick3 3518 difprsnss 3851 trin2 5177 fundif 5423 imadiflem 5458 fnun 5487 fco 5550 f1co 5608 foco 5624 f1oun 5657 f1oco 5660 eqfunfv 5805 ftpg 5893 issmo 6553 tfrlem5 6579 ener 7060 domtr 7066 unen 7099 xpdom2 7123 mapen 7140 pm54.43 7530 axpre-lttrn 8245 axpre-mulgt0 8248 zmulcl 9681 qaddcl 10018 qmulcl 10020 rpaddcl 10061 rpmulcl 10062 rpdivcl 10063 xrltnsym 10178 xrlttri3 10182 ge0addcl 10366 ge0mulcl 10367 ge0xaddcl 10368 expclzaplem 10983 expge0 10995 expge1 10996 hashfacen 11267 qredeu 12858 nn0gcdsq 12961 mul4sq 13156 ballotfilem2 13211 cnovex 15280 iscn2 15284 txuni 15347 txcn 15359 lgsne0 16140 mul2sq 16218 |
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