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Mirrors > Home > MPE Home > Th. List > pm4.71i | Structured version Visualization version GIF version |
Description: Inference converting an implication to a biconditional with conjunction. Inference from Theorem *4.71 of [WhiteheadRussell] p. 120. (Contributed by NM, 4-Jan-2004.) |
Ref | Expression |
---|---|
pm4.71i.1 | ⊢ (𝜑 → 𝜓) |
Ref | Expression |
---|---|
pm4.71i | ⊢ (𝜑 ↔ (𝜑 ∧ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm4.71i.1 | . 2 ⊢ (𝜑 → 𝜓) | |
2 | pm4.71 560 | . 2 ⊢ ((𝜑 → 𝜓) ↔ (𝜑 ↔ (𝜑 ∧ 𝜓))) | |
3 | 1, 2 | mpbi 232 | 1 ⊢ (𝜑 ↔ (𝜑 ∧ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 |
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 209 df-an 399 |
This theorem is referenced by: pm4.71ri 563 pm4.24 566 anabs1 660 pm4.45im 825 pm4.45 994 eu6lem 2654 2eu5 2738 2eu5OLD 2739 rabeqc 3678 imadmrn 5934 dff1o2 6615 f12dfv 7024 isof1oidb 7071 isof1oopb 7072 xpsnen 8595 dom0 8639 dfac5lem2 9544 pwfseqlem4 10078 axgroth6 10244 eqreznegel 12328 xrnemnf 12506 xrnepnf 12507 elioopnf 12825 elioomnf 12826 elicopnf 12827 elxrge0 12839 isprm2 16020 efgrelexlemb 18870 opsrtoslem1 20258 tgphaus 22719 cfilucfil3 23917 ioombl1lem4 24156 vitalilem1 24203 ellogdm 25216 nb3grpr2 27159 upgr2wlk 27444 erclwwlkref 27792 erclwwlknref 27842 0spth 27899 0crct 27906 pjimai 29947 dfrp2 30485 eulerpartlemt0 31622 bnj1101 32051 satfvsuclem2 32602 bj-snglc 34276 bj-epelb 34355 bj-opelidb1 34439 icorempo 34626 wl-cases2-dnf 34746 matunitlindf 34884 pm11.58 40715 |
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