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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 852 reupick3 3491 difprsnss 3812 trin2 5130 fundif 5376 imadiflem 5411 fnun 5440 fco 5502 f1co 5557 foco 5573 f1oun 5606 f1oco 5609 eqfunfv 5752 ftpg 5841 issmo 6459 tfrlem5 6485 ener 6958 domtr 6964 unen 6996 xpdom2 7020 mapen 7037 pm54.43 7400 axpre-lttrn 8109 axpre-mulgt0 8112 zmulcl 9538 qaddcl 9874 qmulcl 9876 rpaddcl 9917 rpmulcl 9918 rpdivcl 9919 xrltnsym 10033 xrlttri3 10037 ge0addcl 10221 ge0mulcl 10222 ge0xaddcl 10223 expclzaplem 10831 expge0 10843 expge1 10844 hashfacen 11106 qredeu 12692 nn0gcdsq 12795 mul4sq 12990 cnovex 14949 iscn2 14953 txuni 15016 txcn 15028 lgsne0 15796 mul2sq 15874 |
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