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Mirrors > Home > ILE Home > Th. List > syl5ib | GIF version |
Description: A mixed syllogism inference. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
syl5ib.1 | ⊢ (𝜑 → 𝜓) |
syl5ib.2 | ⊢ (𝜒 → (𝜓 ↔ 𝜃)) |
Ref | Expression |
---|---|
syl5ib | ⊢ (𝜒 → (𝜑 → 𝜃)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | syl5ib.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | syl5ib.2 | . . 3 ⊢ (𝜒 → (𝜓 ↔ 𝜃)) | |
3 | 2 | biimpd 143 | . 2 ⊢ (𝜒 → (𝜓 → 𝜃)) |
4 | 1, 3 | syl5 32 | 1 ⊢ (𝜒 → (𝜑 → 𝜃)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: syl5ibcom 154 syl5ibr 155 sbft 1821 gencl 2721 spsbc 2924 prexg 4141 posng 4619 sosng 4620 optocl 4623 relcnvexb 5086 funimass1 5208 dmfex 5320 f1ocnvb 5389 eqfnfv2 5527 elpreima 5547 dff13 5677 f1ocnvfv 5688 f1ocnvfvb 5689 fliftfun 5705 eusvobj2 5768 mpoxopn0yelv 6144 rntpos 6162 erexb 6462 findcard2 6791 findcard2s 6792 xpfi 6826 sbthlemi3 6855 enq0tr 7266 addnqprllem 7359 addnqprulem 7360 distrlem1prl 7414 distrlem1pru 7415 recexprlem1ssl 7465 recexprlem1ssu 7466 elrealeu 7661 addcan 7966 addcan2 7967 neg11 8037 negreb 8051 mulcanapd 8446 receuap 8454 cju 8743 nn1suc 8763 nnaddcl 8764 nndivtr 8786 znegclb 9111 zaddcllempos 9115 zmulcl 9131 zeo 9180 uz11 9372 uzp1 9383 eqreznegel 9433 xneg11 9647 xnegdi 9681 modqadd1 10165 modqmul1 10181 frec2uzltd 10207 bccmpl 10532 fz1eqb 10569 cj11 10709 rennim 10806 resqrexlemgt0 10824 efne0 11421 dvdsabseq 11581 uptx 12482 hmeocnvb 12526 tgioo 12754 bj-nnbidc 13133 bj-prexg 13280 strcollnft 13353 |
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