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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 3490 difprsnss 3809 trin2 5126 fundif 5371 imadiflem 5406 fnun 5435 fco 5497 f1co 5551 foco 5567 f1oun 5600 f1oco 5603 eqfunfv 5745 ftpg 5833 issmo 6449 tfrlem5 6475 ener 6948 domtr 6954 unen 6986 xpdom2 7010 mapen 7027 pm54.43 7389 axpre-lttrn 8097 axpre-mulgt0 8100 zmulcl 9526 qaddcl 9862 qmulcl 9864 rpaddcl 9905 rpmulcl 9906 rpdivcl 9907 xrltnsym 10021 xrlttri3 10025 ge0addcl 10209 ge0mulcl 10210 ge0xaddcl 10211 expclzaplem 10818 expge0 10830 expge1 10831 hashfacen 11093 qredeu 12662 nn0gcdsq 12765 mul4sq 12960 cnovex 14913 iscn2 14917 txuni 14980 txcn 14992 lgsne0 15760 mul2sq 15838 |
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