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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 2172 eqtr2 2250 pm13.181 2484 rmob 3125 disjne 3548 seex 4432 tron 4479 fssres 5512 funbrfvb 5686 funopfvb 5687 fvelrnb 5693 fvco 5716 fvimacnvi 5761 ffvresb 5810 fcof 5833 funresdfunsnss 5857 fvtp2g 5863 fvtp2 5866 fnex 5876 funex 5877 1st2nd 6344 dftpos4 6429 nnmsucr 6656 nnmcan 6687 xpmapenlem 7035 fundmfibi 7137 sup3exmid 9137 nzadd 9532 peano5uzti 9588 fnn0ind 9596 uztrn2 9774 irradd 9880 xltnegi 10070 xaddnemnf 10092 xaddnepnf 10093 xaddcom 10096 xnegdi 10103 elioore 10147 uzsubsubfz1 10283 fzo1fzo0n0 10423 elfzonelfzo 10476 qbtwnxr 10518 faclbnd 11004 faclbnd3 11006 swrdccat3b 11325 dvdsprime 12699 pcgcd 12907 znf1o 14671 restuni 14902 stoig 14903 cnnei 14962 tgioo 15284 divcnap 15295 ivthdich 15383 lgsdi 15772 bj-indind 16553 |
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