![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > numthcor | Structured version Visualization version GIF version |
Description: Any set is strictly dominated by some ordinal. (Contributed by NM, 22-Oct-2003.) |
Ref | Expression |
---|---|
numthcor | ⊢ (𝐴 ∈ 𝑉 → ∃𝑥 ∈ On 𝐴 ≺ 𝑥) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq1 5151 | . . 3 ⊢ (𝑦 = 𝐴 → (𝑦 ≺ 𝑥 ↔ 𝐴 ≺ 𝑥)) | |
2 | 1 | rexbidv 3179 | . 2 ⊢ (𝑦 = 𝐴 → (∃𝑥 ∈ On 𝑦 ≺ 𝑥 ↔ ∃𝑥 ∈ On 𝐴 ≺ 𝑥)) |
3 | vpwex 5375 | . . . 4 ⊢ 𝒫 𝑦 ∈ V | |
4 | 3 | numth2 10463 | . . 3 ⊢ ∃𝑥 ∈ On 𝑥 ≈ 𝒫 𝑦 |
5 | vex 3479 | . . . . . 6 ⊢ 𝑦 ∈ V | |
6 | 5 | canth2 9127 | . . . . 5 ⊢ 𝑦 ≺ 𝒫 𝑦 |
7 | ensym 8996 | . . . . 5 ⊢ (𝑥 ≈ 𝒫 𝑦 → 𝒫 𝑦 ≈ 𝑥) | |
8 | sdomentr 9108 | . . . . 5 ⊢ ((𝑦 ≺ 𝒫 𝑦 ∧ 𝒫 𝑦 ≈ 𝑥) → 𝑦 ≺ 𝑥) | |
9 | 6, 7, 8 | sylancr 588 | . . . 4 ⊢ (𝑥 ≈ 𝒫 𝑦 → 𝑦 ≺ 𝑥) |
10 | 9 | reximi 3085 | . . 3 ⊢ (∃𝑥 ∈ On 𝑥 ≈ 𝒫 𝑦 → ∃𝑥 ∈ On 𝑦 ≺ 𝑥) |
11 | 4, 10 | ax-mp 5 | . 2 ⊢ ∃𝑥 ∈ On 𝑦 ≺ 𝑥 |
12 | 2, 11 | vtoclg 3557 | 1 ⊢ (𝐴 ∈ 𝑉 → ∃𝑥 ∈ On 𝐴 ≺ 𝑥) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2107 ∃wrex 3071 𝒫 cpw 4602 class class class wbr 5148 Oncon0 6362 ≈ cen 8933 ≺ csdm 8935 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7722 ax-ac2 10455 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6298 df-ord 6365 df-on 6366 df-suc 6368 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-isom 6550 df-riota 7362 df-ov 7409 df-2nd 7973 df-frecs 8263 df-wrecs 8294 df-recs 8368 df-er 8700 df-en 8937 df-dom 8938 df-sdom 8939 df-card 9931 df-ac 10108 |
This theorem is referenced by: cardmin 10556 |
Copyright terms: Public domain | W3C validator |