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| Mirrors > Home > MPE Home > Th. List > fodomnum | Structured version Visualization version GIF version | ||
| Description: A version of fodom 10436 that doesn't require the Axiom of Choice ax-ac 10372. (Contributed by Mario Carneiro, 28-Feb-2013.) (Revised by Mario Carneiro, 28-Apr-2015.) |
| Ref | Expression |
|---|---|
| fodomnum | ⊢ (𝐴 ∈ dom card → (𝐹:𝐴–onto→𝐵 → 𝐵 ≼ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | focdmex 7902 | . . . . 5 ⊢ (𝐴 ∈ dom card → (𝐹:𝐴–onto→𝐵 → 𝐵 ∈ V)) | |
| 2 | 1 | com12 32 | . . . 4 ⊢ (𝐹:𝐴–onto→𝐵 → (𝐴 ∈ dom card → 𝐵 ∈ V)) |
| 3 | numacn 9962 | . . . 4 ⊢ (𝐵 ∈ V → (𝐴 ∈ dom card → 𝐴 ∈ AC 𝐵)) | |
| 4 | 2, 3 | syli 39 | . . 3 ⊢ (𝐹:𝐴–onto→𝐵 → (𝐴 ∈ dom card → 𝐴 ∈ AC 𝐵)) |
| 5 | 4 | com12 32 | . 2 ⊢ (𝐴 ∈ dom card → (𝐹:𝐴–onto→𝐵 → 𝐴 ∈ AC 𝐵)) |
| 6 | fodomacn 9969 | . 2 ⊢ (𝐴 ∈ AC 𝐵 → (𝐹:𝐴–onto→𝐵 → 𝐵 ≼ 𝐴)) | |
| 7 | 5, 6 | syli 39 | 1 ⊢ (𝐴 ∈ dom card → (𝐹:𝐴–onto→𝐵 → 𝐵 ≼ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2114 Vcvv 3430 class class class wbr 5086 dom cdm 5624 –onto→wfo 6490 ≼ cdom 8884 cardccrd 9850 AC wacn 9853 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-int 4891 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-se 5578 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-isom 6501 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-er 8636 df-map 8768 df-en 8887 df-dom 8888 df-card 9854 df-acn 9857 |
| This theorem is referenced by: fonum 9971 fodomfi2 9973 infpwfien 9975 inffien 9976 wdomnumr 9977 iunfictbso 10027 infmap2 10130 fictb 10157 cfflb 10172 cfslb2n 10181 fodomg 10435 rankcf 10691 tskuni 10697 tskurn 10703 znnen 16170 qnnen 16171 cygctb 19858 1stcrestlem 23427 2ndcctbss 23430 2ndcomap 23433 2ndcsep 23434 tx1stc 23625 tx2ndc 23626 met1stc 24496 met2ndci 24497 re2ndc 24776 uniiccdif 25555 dyadmbl 25577 opnmblALT 25580 mbfimaopnlem 25632 aannenlem3 26307 rn1st 45720 |
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