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Mirrors > Home > MPE Home > Th. List > wdomnumr | Structured version Visualization version GIF version |
Description: Weak dominance agrees with normal for numerable right sets. (Contributed by Stefan O'Rear, 28-Feb-2015.) (Revised by Mario Carneiro, 5-May-2015.) |
Ref | Expression |
---|---|
wdomnumr | ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 ↔ 𝐴 ≼ 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brwdom 9019 | . . 3 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 ↔ (𝐴 = ∅ ∨ ∃𝑥 𝑥:𝐵–onto→𝐴))) | |
2 | 0domg 8632 | . . . . 5 ⊢ (𝐵 ∈ dom card → ∅ ≼ 𝐵) | |
3 | breq1 5060 | . . . . 5 ⊢ (𝐴 = ∅ → (𝐴 ≼ 𝐵 ↔ ∅ ≼ 𝐵)) | |
4 | 2, 3 | syl5ibrcom 248 | . . . 4 ⊢ (𝐵 ∈ dom card → (𝐴 = ∅ → 𝐴 ≼ 𝐵)) |
5 | fodomnum 9471 | . . . . 5 ⊢ (𝐵 ∈ dom card → (𝑥:𝐵–onto→𝐴 → 𝐴 ≼ 𝐵)) | |
6 | 5 | exlimdv 1925 | . . . 4 ⊢ (𝐵 ∈ dom card → (∃𝑥 𝑥:𝐵–onto→𝐴 → 𝐴 ≼ 𝐵)) |
7 | 4, 6 | jaod 853 | . . 3 ⊢ (𝐵 ∈ dom card → ((𝐴 = ∅ ∨ ∃𝑥 𝑥:𝐵–onto→𝐴) → 𝐴 ≼ 𝐵)) |
8 | 1, 7 | sylbid 241 | . 2 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 → 𝐴 ≼ 𝐵)) |
9 | domwdom 9026 | . 2 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ≼* 𝐵) | |
10 | 8, 9 | impbid1 226 | 1 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 ↔ 𝐴 ≼ 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 207 ∨ wo 841 = wceq 1528 ∃wex 1771 ∈ wcel 2105 ∅c0 4288 class class class wbr 5057 dom cdm 5548 –onto→wfo 6346 ≼ cdom 8495 ≼* cwdom 9009 cardccrd 9352 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1787 ax-4 1801 ax-5 1902 ax-6 1961 ax-7 2006 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2151 ax-12 2167 ax-ext 2790 ax-rep 5181 ax-sep 5194 ax-nul 5201 ax-pow 5257 ax-pr 5320 ax-un 7450 |
This theorem depends on definitions: df-bi 208 df-an 397 df-or 842 df-3or 1080 df-3an 1081 df-tru 1531 df-ex 1772 df-nf 1776 df-sb 2061 df-mo 2615 df-eu 2647 df-clab 2797 df-cleq 2811 df-clel 2890 df-nfc 2960 df-ne 3014 df-ral 3140 df-rex 3141 df-reu 3142 df-rmo 3143 df-rab 3144 df-v 3494 df-sbc 3770 df-csb 3881 df-dif 3936 df-un 3938 df-in 3940 df-ss 3949 df-pss 3951 df-nul 4289 df-if 4464 df-pw 4537 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4831 df-int 4868 df-iun 4912 df-br 5058 df-opab 5120 df-mpt 5138 df-tr 5164 df-id 5453 df-eprel 5458 df-po 5467 df-so 5468 df-fr 5507 df-se 5508 df-we 5509 df-xp 5554 df-rel 5555 df-cnv 5556 df-co 5557 df-dm 5558 df-rn 5559 df-res 5560 df-ima 5561 df-pred 6141 df-ord 6187 df-on 6188 df-suc 6190 df-iota 6307 df-fun 6350 df-fn 6351 df-f 6352 df-f1 6353 df-fo 6354 df-f1o 6355 df-fv 6356 df-isom 6357 df-riota 7103 df-ov 7148 df-oprab 7149 df-mpo 7150 df-1st 7678 df-2nd 7679 df-wrecs 7936 df-recs 7997 df-er 8278 df-map 8397 df-en 8498 df-dom 8499 df-sdom 8500 df-wdom 9011 df-card 9356 df-acn 9359 |
This theorem is referenced by: wdomac 9937 ttac 39511 isnumbasgrplem2 39582 |
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