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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 8250 | . . . . 5 ⊢ Rel ≺ | |
2 | 1 | brrelex2i 5409 | . . . 4 ⊢ (𝐴 ≺ 𝐵 → 𝐵 ∈ V) |
3 | numth3 9629 | . . . 4 ⊢ (𝐵 ∈ V → 𝐵 ∈ dom card) | |
4 | cardid2 9114 | . . . 4 ⊢ (𝐵 ∈ dom card → (card‘𝐵) ≈ 𝐵) | |
5 | ensym 8292 | . . . 4 ⊢ ((card‘𝐵) ≈ 𝐵 → 𝐵 ≈ (card‘𝐵)) | |
6 | 2, 3, 4, 5 | 4syl 19 | . . 3 ⊢ (𝐴 ≺ 𝐵 → 𝐵 ≈ (card‘𝐵)) |
7 | sdomentr 8384 | . . 3 ⊢ ((𝐴 ≺ 𝐵 ∧ 𝐵 ≈ (card‘𝐵)) → 𝐴 ≺ (card‘𝐵)) | |
8 | 6, 7 | mpdan 677 | . 2 ⊢ (𝐴 ≺ 𝐵 → 𝐴 ≺ (card‘𝐵)) |
9 | sdomsdomcardi 9132 | . 2 ⊢ (𝐴 ≺ (card‘𝐵) → 𝐴 ≺ 𝐵) | |
10 | 8, 9 | impbii 201 | 1 ⊢ (𝐴 ≺ 𝐵 ↔ 𝐴 ≺ (card‘𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 198 ∈ wcel 2107 Vcvv 3398 class class class wbr 4888 dom cdm 5357 ‘cfv 6137 ≈ cen 8240 ≺ csdm 8242 cardccrd 9096 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1839 ax-4 1853 ax-5 1953 ax-6 2021 ax-7 2055 ax-8 2109 ax-9 2116 ax-10 2135 ax-11 2150 ax-12 2163 ax-13 2334 ax-ext 2754 ax-rep 5008 ax-sep 5019 ax-nul 5027 ax-pow 5079 ax-pr 5140 ax-un 7228 ax-ac2 9622 |
This theorem depends on definitions: df-bi 199 df-an 387 df-or 837 df-3or 1072 df-3an 1073 df-tru 1605 df-ex 1824 df-nf 1828 df-sb 2012 df-mo 2551 df-eu 2587 df-clab 2764 df-cleq 2770 df-clel 2774 df-nfc 2921 df-ne 2970 df-ral 3095 df-rex 3096 df-reu 3097 df-rmo 3098 df-rab 3099 df-v 3400 df-sbc 3653 df-csb 3752 df-dif 3795 df-un 3797 df-in 3799 df-ss 3806 df-pss 3808 df-nul 4142 df-if 4308 df-pw 4381 df-sn 4399 df-pr 4401 df-tp 4403 df-op 4405 df-uni 4674 df-int 4713 df-iun 4757 df-br 4889 df-opab 4951 df-mpt 4968 df-tr 4990 df-id 5263 df-eprel 5268 df-po 5276 df-so 5277 df-fr 5316 df-se 5317 df-we 5318 df-xp 5363 df-rel 5364 df-cnv 5365 df-co 5366 df-dm 5367 df-rn 5368 df-res 5369 df-ima 5370 df-pred 5935 df-ord 5981 df-on 5982 df-suc 5984 df-iota 6101 df-fun 6139 df-fn 6140 df-f 6141 df-f1 6142 df-fo 6143 df-f1o 6144 df-fv 6145 df-isom 6146 df-riota 6885 df-wrecs 7691 df-recs 7753 df-er 8028 df-en 8244 df-dom 8245 df-sdom 8246 df-card 9100 df-ac 9274 |
This theorem is referenced by: (None) |
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