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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 850 reupick3 3489 difprsnss 3806 trin2 5123 fundif 5368 imadiflem 5403 fnun 5432 fco 5494 f1co 5548 foco 5564 f1oun 5597 f1oco 5600 eqfunfv 5742 ftpg 5830 issmo 6445 tfrlem5 6471 ener 6944 domtr 6950 unen 6982 xpdom2 7003 mapen 7020 pm54.43 7379 axpre-lttrn 8087 axpre-mulgt0 8090 zmulcl 9516 qaddcl 9847 qmulcl 9849 rpaddcl 9890 rpmulcl 9891 rpdivcl 9892 xrltnsym 10006 xrlttri3 10010 ge0addcl 10194 ge0mulcl 10195 ge0xaddcl 10196 expclzaplem 10802 expge0 10814 expge1 10815 hashfacen 11076 qredeu 12640 nn0gcdsq 12743 mul4sq 12938 cnovex 14891 iscn2 14895 txuni 14958 txcn 14970 lgsne0 15738 mul2sq 15816 |
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