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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 4426 tron 4473 fssres 5503 funbrfvb 5676 funopfvb 5677 fvelrnb 5683 fvco 5706 fvimacnvi 5751 ffvresb 5800 fcof 5822 funresdfunsnss 5846 fvtp2g 5852 fvtp2 5855 fnex 5865 funex 5866 1st2nd 6333 dftpos4 6415 nnmsucr 6642 nnmcan 6673 xpmapenlem 7018 fundmfibi 7116 sup3exmid 9115 nzadd 9510 peano5uzti 9566 fnn0ind 9574 uztrn2 9752 irradd 9853 xltnegi 10043 xaddnemnf 10065 xaddnepnf 10066 xaddcom 10069 xnegdi 10076 elioore 10120 uzsubsubfz1 10256 fzo1fzo0n0 10395 elfzonelfzo 10448 qbtwnxr 10489 faclbnd 10975 faclbnd3 10977 swrdccat3b 11287 dvdsprime 12659 pcgcd 12867 znf1o 14630 restuni 14861 stoig 14862 cnnei 14921 tgioo 15243 divcnap 15254 ivthdich 15342 lgsdi 15731 bj-indind 16350 |
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