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| Mirrors > Home > MPE Home > Th. List > sdomsdomcard | Structured version Visualization version GIF version | ||
| Description: A set strictly dominates iff its cardinal strictly dominates. (Contributed by NM, 30-Oct-2003.) |
| Ref | Expression |
|---|---|
| sdomsdomcard | ⊢ (𝐴 ≺ 𝐵 ↔ 𝐴 ≺ (card‘𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relsdom 8952 | . . . . 5 ⊢ Rel ≺ | |
| 2 | 1 | brrelex2i 5721 | . . . 4 ⊢ (𝐴 ≺ 𝐵 → 𝐵 ∈ V) |
| 3 | numth3 10456 | . . . 4 ⊢ (𝐵 ∈ V → 𝐵 ∈ dom card) | |
| 4 | cardid2 9941 | . . . 4 ⊢ (𝐵 ∈ dom card → (card‘𝐵) ≈ 𝐵) | |
| 5 | ensym 9002 | . . . 4 ⊢ ((card‘𝐵) ≈ 𝐵 → 𝐵 ≈ (card‘𝐵)) | |
| 6 | 2, 3, 4, 5 | 4syl 20 | . . 3 ⊢ (𝐴 ≺ 𝐵 → 𝐵 ≈ (card‘𝐵)) |
| 7 | sdomentr 9101 | . . 3 ⊢ ((𝐴 ≺ 𝐵 ∧ 𝐵 ≈ (card‘𝐵)) → 𝐴 ≺ (card‘𝐵)) | |
| 8 | 6, 7 | mpdan 699 | . 2 ⊢ (𝐴 ≺ 𝐵 → 𝐴 ≺ (card‘𝐵)) |
| 9 | sdomsdomcardi 9959 | . 2 ⊢ (𝐴 ≺ (card‘𝐵) → 𝐴 ≺ 𝐵) | |
| 10 | 8, 9 | impbii 212 | 1 ⊢ (𝐴 ≺ 𝐵 ↔ 𝐴 ≺ (card‘𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∈ wcel 2149 Vcvv 3463 class class class wbr 5113 dom cdm 5664 ‘cfv 6539 ≈ cen 8942 ≺ csdm 8944 cardccrd 9923 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5273 ax-pow 5339 ax-pr 5407 ax-un 7735 ax-ac2 10449 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5559 df-eprel 5564 df-po 5572 df-so 5573 df-fr 5617 df-se 5618 df-we 5619 df-xp 5670 df-rel 5671 df-cnv 5672 df-co 5673 df-dm 5674 df-rn 5675 df-res 5676 df-ima 5677 df-pred 6305 df-ord 6366 df-on 6367 df-suc 6369 df-iota 6495 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7370 df-ov 7416 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-card 9927 df-ac 10102 |
| This theorem is referenced by: (None) |
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