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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 3492 difprsnss 3811 trin2 5128 fundif 5374 imadiflem 5409 fnun 5438 fco 5500 f1co 5554 foco 5570 f1oun 5603 f1oco 5606 eqfunfv 5749 ftpg 5838 issmo 6454 tfrlem5 6480 ener 6953 domtr 6959 unen 6991 xpdom2 7015 mapen 7032 pm54.43 7395 axpre-lttrn 8104 axpre-mulgt0 8107 zmulcl 9533 qaddcl 9869 qmulcl 9871 rpaddcl 9912 rpmulcl 9913 rpdivcl 9914 xrltnsym 10028 xrlttri3 10032 ge0addcl 10216 ge0mulcl 10217 ge0xaddcl 10218 expclzaplem 10826 expge0 10838 expge1 10839 hashfacen 11101 qredeu 12671 nn0gcdsq 12774 mul4sq 12969 cnovex 14923 iscn2 14927 txuni 14990 txcn 15002 lgsne0 15770 mul2sq 15848 |
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