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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 | pm4.71 660 | . 2 ⊢ ((𝜑 → 𝜓) ↔ (𝜑 ↔ (𝜑 ∧ 𝜓))) | |
3 | 1, 2 | mpbi 219 | 1 ⊢ (𝜑 ↔ (𝜑 ∧ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 |
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 |
This theorem is referenced by: pm4.24 673 pm4.45 720 anabs1 846 2eu5 2545 imadmrn 5395 dff1o2 6055 f12dfv 6429 isof1oidb 6474 isof1oopb 6475 xpsnen 7929 dom0 7973 dfac5lem2 8830 pwfseqlem4 9363 axgroth6 9529 eqreznegel 11650 xrnemnf 11827 xrnepnf 11828 elioopnf 12138 elioomnf 12139 elicopnf 12140 elxrge0 12152 isprm2 15233 efgrelexlemb 17986 opsrtoslem1 19305 tgphaus 21730 cfilucfil3 22925 ioombl1lem4 23136 vitalilem1 23182 vitalilem1OLD 23183 ellogdm 24185 nb3grapr2 25983 is2wlk 26095 0spth 26101 0crct 26154 0cycl 26155 erclwwlkref 26341 erclwwlknref 26353 pjimai 28419 dfrp2 28922 eulerpartlemt0 29758 bnj1101 30109 bj-snglc 32150 icorempt2 32375 wl-cases2-dnf 32474 matunitlindf 32577 pm11.58 37612 nb3grpr2 40611 upgr2wlk 40876 erclwwlksref 41241 erclwwlksnref 41253 0spth-av 41294 0Crct 41300 0Cycl 41301 |
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