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Mirrors > Home > MPE Home > Th. List > sylbb | Structured version Visualization version GIF version |
Description: A mixed syllogism inference from two biconditionals. (Contributed by BJ, 30-Mar-2019.) |
Ref | Expression |
---|---|
sylbb.1 | ⊢ (𝜑 ↔ 𝜓) |
sylbb.2 | ⊢ (𝜓 ↔ 𝜒) |
Ref | Expression |
---|---|
sylbb | ⊢ (𝜑 → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sylbb.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
2 | sylbb.2 | . . 3 ⊢ (𝜓 ↔ 𝜒) | |
3 | 2 | biimpi 205 | . 2 ⊢ (𝜓 → 𝜒) |
4 | 1, 3 | sylbi 206 | 1 ⊢ (𝜑 → 𝜒) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 196 |
This theorem is referenced by: bitri 263 disjxiun 4579 trint 4696 pocl 4966 wefrc 5032 frsn 5112 ssrel 5130 funiun 6318 funopsn 6319 fissuni 8154 inf3lem2 8409 rankvalb 8543 xrrebnd 11873 xaddf 11929 elfznelfzob 12440 fsuppmapnn0ub 12657 hashinfxadd 13035 hashfun 13084 clatl 16939 sgrp2nmndlem5 17239 mat1dimelbas 20096 cfinfil 21507 dyadmax 23172 wwlknfi 26266 isch3 27482 nmopun 28257 esumnul 29437 dya2iocnrect 29670 bnj849 30249 bnj1279 30340 onsucuni3 32391 wl-nfeqfb 32502 poimirlem27 32606 unitresl 33054 iunrelexp0 37013 frege129d 37074 clsk3nimkb 37358 gneispace 37452 stoweidlem48 38941 fourierdlem42 39042 fourierdlem80 39079 oddprmALTV 40136 ausgrusgri 40398 nbupgrres 40592 usgredgsscusgredg 40675 1egrvtxdg0 40727 1wlkp1lem7 40888 wwlksnfi 41112 alimp-no-surprise 42336 |
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