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Mirrors > Home > MPE Home > Th. List > pwxpndom | Structured version Visualization version GIF version |
Description: The powerset of a Dedekind-infinite set does not inject into its Cartesian product with itself. (Contributed by Mario Carneiro, 31-May-2015.) |
Ref | Expression |
---|---|
pwxpndom | ⊢ (ω ≼ 𝐴 → ¬ 𝒫 𝐴 ≼ (𝐴 × 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pwxpndom2 10279 | . 2 ⊢ (ω ≼ 𝐴 → ¬ 𝒫 𝐴 ≼ (𝐴 ⊔ (𝐴 × 𝐴))) | |
2 | reldom 8632 | . . . . . . 7 ⊢ Rel ≼ | |
3 | 2 | brrelex2i 5606 | . . . . . 6 ⊢ (ω ≼ 𝐴 → 𝐴 ∈ V) |
4 | 3, 3 | xpexd 7536 | . . . . 5 ⊢ (ω ≼ 𝐴 → (𝐴 × 𝐴) ∈ V) |
5 | djudoml 9798 | . . . . 5 ⊢ (((𝐴 × 𝐴) ∈ V ∧ 𝐴 ∈ V) → (𝐴 × 𝐴) ≼ ((𝐴 × 𝐴) ⊔ 𝐴)) | |
6 | 4, 3, 5 | syl2anc 587 | . . . 4 ⊢ (ω ≼ 𝐴 → (𝐴 × 𝐴) ≼ ((𝐴 × 𝐴) ⊔ 𝐴)) |
7 | djucomen 9791 | . . . . 5 ⊢ (((𝐴 × 𝐴) ∈ V ∧ 𝐴 ∈ V) → ((𝐴 × 𝐴) ⊔ 𝐴) ≈ (𝐴 ⊔ (𝐴 × 𝐴))) | |
8 | 4, 3, 7 | syl2anc 587 | . . . 4 ⊢ (ω ≼ 𝐴 → ((𝐴 × 𝐴) ⊔ 𝐴) ≈ (𝐴 ⊔ (𝐴 × 𝐴))) |
9 | domentr 8687 | . . . 4 ⊢ (((𝐴 × 𝐴) ≼ ((𝐴 × 𝐴) ⊔ 𝐴) ∧ ((𝐴 × 𝐴) ⊔ 𝐴) ≈ (𝐴 ⊔ (𝐴 × 𝐴))) → (𝐴 × 𝐴) ≼ (𝐴 ⊔ (𝐴 × 𝐴))) | |
10 | 6, 8, 9 | syl2anc 587 | . . 3 ⊢ (ω ≼ 𝐴 → (𝐴 × 𝐴) ≼ (𝐴 ⊔ (𝐴 × 𝐴))) |
11 | domtr 8681 | . . . 4 ⊢ ((𝒫 𝐴 ≼ (𝐴 × 𝐴) ∧ (𝐴 × 𝐴) ≼ (𝐴 ⊔ (𝐴 × 𝐴))) → 𝒫 𝐴 ≼ (𝐴 ⊔ (𝐴 × 𝐴))) | |
12 | 11 | expcom 417 | . . 3 ⊢ ((𝐴 × 𝐴) ≼ (𝐴 ⊔ (𝐴 × 𝐴)) → (𝒫 𝐴 ≼ (𝐴 × 𝐴) → 𝒫 𝐴 ≼ (𝐴 ⊔ (𝐴 × 𝐴)))) |
13 | 10, 12 | syl 17 | . 2 ⊢ (ω ≼ 𝐴 → (𝒫 𝐴 ≼ (𝐴 × 𝐴) → 𝒫 𝐴 ≼ (𝐴 ⊔ (𝐴 × 𝐴)))) |
14 | 1, 13 | mtod 201 | 1 ⊢ (ω ≼ 𝐴 → ¬ 𝒫 𝐴 ≼ (𝐴 × 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∈ wcel 2110 Vcvv 3408 𝒫 cpw 4513 class class class wbr 5053 × cxp 5549 ωcom 7644 ≈ cen 8623 ≼ cdom 8624 ⊔ cdju 9514 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2016 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2158 ax-12 2175 ax-ext 2708 ax-rep 5179 ax-sep 5192 ax-nul 5199 ax-pow 5258 ax-pr 5322 ax-un 7523 ax-inf2 9256 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2071 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2816 df-nfc 2886 df-ne 2941 df-ral 3066 df-rex 3067 df-reu 3068 df-rmo 3069 df-rab 3070 df-v 3410 df-sbc 3695 df-csb 3812 df-dif 3869 df-un 3871 df-in 3873 df-ss 3883 df-pss 3885 df-nul 4238 df-if 4440 df-pw 4515 df-sn 4542 df-pr 4544 df-tp 4546 df-op 4548 df-uni 4820 df-int 4860 df-iun 4906 df-br 5054 df-opab 5116 df-mpt 5136 df-tr 5162 df-id 5455 df-eprel 5460 df-po 5468 df-so 5469 df-fr 5509 df-se 5510 df-we 5511 df-xp 5557 df-rel 5558 df-cnv 5559 df-co 5560 df-dm 5561 df-rn 5562 df-res 5563 df-ima 5564 df-pred 6160 df-ord 6216 df-on 6217 df-lim 6218 df-suc 6219 df-iota 6338 df-fun 6382 df-fn 6383 df-f 6384 df-f1 6385 df-fo 6386 df-f1o 6387 df-fv 6388 df-isom 6389 df-riota 7170 df-ov 7216 df-oprab 7217 df-mpo 7218 df-om 7645 df-1st 7761 df-2nd 7762 df-supp 7904 df-wrecs 8047 df-recs 8108 df-rdg 8146 df-seqom 8184 df-1o 8202 df-2o 8203 df-oadd 8206 df-omul 8207 df-oexp 8208 df-er 8391 df-map 8510 df-en 8627 df-dom 8628 df-sdom 8629 df-fin 8630 df-fsupp 8986 df-oi 9126 df-har 9173 df-cnf 9277 df-dju 9517 df-card 9555 |
This theorem is referenced by: gchxpidm 10283 |
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