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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 9462 | . . 3 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 ↔ (𝐴 = ∅ ∨ ∃𝑥 𝑥:𝐵–onto→𝐴))) | |
| 2 | 0domg 9026 | . . . . 5 ⊢ (𝐵 ∈ dom card → ∅ ≼ 𝐵) | |
| 3 | breq1 5098 | . . . . 5 ⊢ (𝐴 = ∅ → (𝐴 ≼ 𝐵 ↔ ∅ ≼ 𝐵)) | |
| 4 | 2, 3 | syl5ibrcom 247 | . . . 4 ⊢ (𝐵 ∈ dom card → (𝐴 = ∅ → 𝐴 ≼ 𝐵)) |
| 5 | fodomnum 9957 | . . . . 5 ⊢ (𝐵 ∈ dom card → (𝑥:𝐵–onto→𝐴 → 𝐴 ≼ 𝐵)) | |
| 6 | 5 | exlimdv 1934 | . . . 4 ⊢ (𝐵 ∈ dom card → (∃𝑥 𝑥:𝐵–onto→𝐴 → 𝐴 ≼ 𝐵)) |
| 7 | 4, 6 | jaod 859 | . . 3 ⊢ (𝐵 ∈ dom card → ((𝐴 = ∅ ∨ ∃𝑥 𝑥:𝐵–onto→𝐴) → 𝐴 ≼ 𝐵)) |
| 8 | 1, 7 | sylbid 240 | . 2 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 → 𝐴 ≼ 𝐵)) |
| 9 | domwdom 9469 | . 2 ⊢ (𝐴 ≼ 𝐵 → 𝐴 ≼* 𝐵) | |
| 10 | 8, 9 | impbid1 225 | 1 ⊢ (𝐵 ∈ dom card → (𝐴 ≼* 𝐵 ↔ 𝐴 ≼ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∨ wo 847 = wceq 1541 ∃wex 1780 ∈ wcel 2113 ∅c0 4282 class class class wbr 5095 dom cdm 5621 –onto→wfo 6486 ≼ cdom 8875 ≼* cwdom 9459 cardccrd 9837 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-int 4900 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-isom 6497 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-1st 7929 df-2nd 7930 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-er 8630 df-map 8760 df-en 8878 df-dom 8879 df-sdom 8880 df-wdom 9460 df-card 9841 df-acn 9844 |
| This theorem is referenced by: wdomac 10427 ttac 43156 isnumbasgrplem2 43224 |
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