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| Mirrors > Home > ILE Home > Th. List > sylanb | GIF version | ||
| Description: A syllogism inference. (Contributed by NM, 18-May-1994.) |
| Ref | Expression |
|---|---|
| sylanb.1 | ⊢ (𝜑 ↔ 𝜓) |
| sylanb.2 | ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
| Ref | Expression |
|---|---|
| sylanb | ⊢ ((𝜑 ∧ 𝜒) → 𝜃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sylanb.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | 1 | biimpi 120 | . 2 ⊢ (𝜑 → 𝜓) |
| 3 | sylanb.2 | . 2 ⊢ ((𝜓 ∧ 𝜒) → 𝜃) | |
| 4 | 2, 3 | sylan 283 | 1 ⊢ ((𝜑 ∧ 𝜒) → 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: syl2anb 291 anabsan 577 2exeu 2173 eqtr2 2251 pm13.181 2494 rmob 3136 disjne 3562 seex 4456 tron 4503 fssres 5540 funbrfvb 5717 funopfvb 5718 fvelrnb 5724 fvco 5747 fvimacnvi 5792 ffvresb 5840 fcof 5863 funresdfunsnss 5887 fvtp2g 5893 fvtp2 5896 fnex 5906 funex 5909 1st2nd 6375 imacosuppfn 6468 dftpos4 6494 nnmsucr 6721 nnmcan 6752 xpmapenlem 7102 fundmfibi 7205 sup3exmid 9231 nzadd 9630 peano5uzti 9686 fnn0ind 9694 uztrn2 9872 irradd 9978 xltnegi 10168 xaddnemnf 10190 xaddnepnf 10191 xaddcom 10194 xnegdi 10201 elioore 10245 uzsubsubfz1 10382 fzo1fzo0n0 10522 elfzonelfzo 10575 qbtwnxr 10617 faclbnd 11103 faclbnd3 11105 swrdccat3b 11432 dvdsprime 12819 pcgcd 13027 znf1o 14799 restuni 15037 stoig 15038 cnnei 15097 tgioo 15419 divcnap 15430 ivthdich 15518 lgsdi 15910 bj-indind 16702 |
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