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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 575 2exeu 2170 eqtr2 2248 pm13.181 2482 rmob 3122 disjne 3545 seex 4427 tron 4474 fssres 5506 funbrfvb 5679 funopfvb 5680 fvelrnb 5686 fvco 5709 fvimacnvi 5754 ffvresb 5803 fcof 5825 funresdfunsnss 5849 fvtp2g 5855 fvtp2 5858 fnex 5868 funex 5869 1st2nd 6336 dftpos4 6420 nnmsucr 6647 nnmcan 6678 xpmapenlem 7023 fundmfibi 7121 sup3exmid 9120 nzadd 9515 peano5uzti 9571 fnn0ind 9579 uztrn2 9757 irradd 9858 xltnegi 10048 xaddnemnf 10070 xaddnepnf 10071 xaddcom 10074 xnegdi 10081 elioore 10125 uzsubsubfz1 10261 fzo1fzo0n0 10400 elfzonelfzo 10453 qbtwnxr 10494 faclbnd 10980 faclbnd3 10982 swrdccat3b 11293 dvdsprime 12665 pcgcd 12873 znf1o 14636 restuni 14867 stoig 14868 cnnei 14927 tgioo 15249 divcnap 15260 ivthdich 15348 lgsdi 15737 bj-indind 16404 |
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