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Mirrors > Home > MPE Home > Th. List > 3anbi3i | Structured version Visualization version GIF version |
Description: Inference adding two conjuncts to each side of a biconditional. (Contributed by NM, 8-Sep-2006.) |
Ref | Expression |
---|---|
3anbi1i.1 | ⊢ (𝜑 ↔ 𝜓) |
Ref | Expression |
---|---|
3anbi3i | ⊢ ((𝜒 ∧ 𝜃 ∧ 𝜑) ↔ (𝜒 ∧ 𝜃 ∧ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biid 250 | . 2 ⊢ (𝜒 ↔ 𝜒) | |
2 | biid 250 | . 2 ⊢ (𝜃 ↔ 𝜃) | |
3 | 3anbi1i.1 | . 2 ⊢ (𝜑 ↔ 𝜓) | |
4 | 1, 2, 3 | 3anbi123i 1244 | 1 ⊢ ((𝜒 ∧ 𝜃 ∧ 𝜑) ↔ (𝜒 ∧ 𝜃 ∧ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 195 ∧ w3a 1031 |
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 df-an 385 df-3an 1033 |
This theorem is referenced by: cadcomb 1543 dfer2 7630 axgroth2 9526 oppgsubm 17615 xrsdsreclb 19612 ordthaus 20998 qtopeu 21329 regr1lem2 21353 isfbas2 21449 isclmp 22705 nbgrasym 25968 xrge0adddir 29023 isros 29558 bnj964 30267 bnj1033 30291 dfon2lem7 30938 outsideofcom 31405 linecom 31427 linerflx2 31428 topdifinffinlem 32371 rdgeqoa 32394 ishlat2 33658 lhpex2leN 34317 fourierdlem103 39102 fourierdlem104 39103 issmf 39614 issmff 39620 issmfle 39632 issmfgt 39643 issmfge 39656 umgr2edg1 40438 |
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