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Mirrors > Home > ILE Home > Th. List > exmidlpo | GIF version |
Description: Excluded middle implies the Limited Principle of Omniscience (LPO). (Contributed by Jim Kingdon, 29-Mar-2023.) |
Ref | Expression |
---|---|
exmidlpo | ⊢ (EXMID → ω ∈ Omni) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | exmidomni 7068 | . 2 ⊢ (EXMID ↔ ∀𝑥 𝑥 ∈ Omni) | |
2 | omex 4550 | . . 3 ⊢ ω ∈ V | |
3 | eleq1 2220 | . . 3 ⊢ (𝑥 = ω → (𝑥 ∈ Omni ↔ ω ∈ Omni)) | |
4 | 2, 3 | spcv 2806 | . 2 ⊢ (∀𝑥 𝑥 ∈ Omni → ω ∈ Omni) |
5 | 1, 4 | sylbi 120 | 1 ⊢ (EXMID → ω ∈ Omni) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∀wal 1333 ∈ wcel 2128 EXMIDwem 4154 ωcom 4547 Omnicomni 7060 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1427 ax-7 1428 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-10 1485 ax-11 1486 ax-i12 1487 ax-bndl 1489 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-13 2130 ax-14 2131 ax-ext 2139 ax-sep 4082 ax-nul 4090 ax-pow 4134 ax-pr 4168 ax-un 4392 ax-iinf 4545 |
This theorem depends on definitions: df-bi 116 df-dc 821 df-3an 965 df-tru 1338 df-fal 1341 df-nf 1441 df-sb 1743 df-eu 2009 df-mo 2010 df-clab 2144 df-cleq 2150 df-clel 2153 df-nfc 2288 df-ne 2328 df-ral 2440 df-rex 2441 df-rab 2444 df-v 2714 df-sbc 2938 df-dif 3104 df-un 3106 df-in 3108 df-ss 3115 df-nul 3395 df-pw 3545 df-sn 3566 df-pr 3567 df-op 3569 df-uni 3773 df-int 3808 df-br 3966 df-opab 4026 df-mpt 4027 df-exmid 4155 df-id 4252 df-suc 4330 df-iom 4548 df-xp 4589 df-rel 4590 df-cnv 4591 df-co 4592 df-dm 4593 df-rn 4594 df-iota 5132 df-fun 5169 df-fn 5170 df-f 5171 df-fv 5175 df-1o 6357 df-2o 6358 df-omni 7061 |
This theorem is referenced by: exmidmp 7083 |
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