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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 853 reupick3 3505 difprsnss 3831 trin2 5153 fundif 5399 imadiflem 5434 fnun 5463 fco 5526 f1co 5584 foco 5600 f1oun 5633 f1oco 5636 eqfunfv 5779 ftpg 5867 issmo 6518 tfrlem5 6544 ener 7018 domtr 7024 unen 7057 xpdom2 7081 mapen 7098 pm54.43 7486 axpre-lttrn 8195 axpre-mulgt0 8198 zmulcl 9627 qaddcl 9963 qmulcl 9965 rpaddcl 10006 rpmulcl 10007 rpdivcl 10008 xrltnsym 10122 xrlttri3 10126 ge0addcl 10310 ge0mulcl 10311 ge0xaddcl 10312 expclzaplem 10921 expge0 10933 expge1 10934 hashfacen 11201 qredeu 12787 nn0gcdsq 12890 mul4sq 13085 cnovex 15048 iscn2 15052 txuni 15115 txcn 15127 lgsne0 15898 mul2sq 15976 |
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