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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 418 stdcndc 847 reupick3 3462 difprsnss 3777 trin2 5088 fundif 5332 imadiflem 5367 fnun 5396 fco 5456 f1co 5510 foco 5526 f1oun 5559 f1oco 5562 eqfunfv 5700 ftpg 5786 issmo 6392 tfrlem5 6418 ener 6889 domtr 6895 unen 6927 xpdom2 6946 mapen 6963 pm54.43 7319 axpre-lttrn 8027 axpre-mulgt0 8030 zmulcl 9456 qaddcl 9786 qmulcl 9788 rpaddcl 9829 rpmulcl 9830 rpdivcl 9831 xrltnsym 9945 xrlttri3 9949 ge0addcl 10133 ge0mulcl 10134 ge0xaddcl 10135 expclzaplem 10740 expge0 10752 expge1 10753 hashfacen 11013 qredeu 12504 nn0gcdsq 12607 mul4sq 12802 cnovex 14753 iscn2 14757 txuni 14820 txcn 14832 lgsne0 15600 mul2sq 15678 |
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