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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 2485 rmob 3126 disjne 3550 seex 4438 tron 4485 fssres 5520 funbrfvb 5695 funopfvb 5696 fvelrnb 5702 fvco 5725 fvimacnvi 5770 ffvresb 5818 fcof 5841 funresdfunsnss 5865 fvtp2g 5871 fvtp2 5874 fnex 5884 funex 5887 1st2nd 6353 imacosuppfn 6446 dftpos4 6472 nnmsucr 6699 nnmcan 6730 xpmapenlem 7078 fundmfibi 7180 sup3exmid 9179 nzadd 9576 peano5uzti 9632 fnn0ind 9640 uztrn2 9818 irradd 9924 xltnegi 10114 xaddnemnf 10136 xaddnepnf 10137 xaddcom 10140 xnegdi 10147 elioore 10191 uzsubsubfz1 10328 fzo1fzo0n0 10468 elfzonelfzo 10521 qbtwnxr 10563 faclbnd 11049 faclbnd3 11051 swrdccat3b 11370 dvdsprime 12757 pcgcd 12965 znf1o 14730 restuni 14966 stoig 14967 cnnei 15026 tgioo 15348 divcnap 15359 ivthdich 15447 lgsdi 15839 bj-indind 16631 |
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