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| Mirrors > Home > MPE Home > Th. List > fodomnum | Structured version Visualization version GIF version | ||
| Description: A version of fodom 10445 that doesn't require the Axiom of Choice ax-ac 10381. (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 7910 | . . . . 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 9971 | . . . 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 9978 | . 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 3442 class class class wbr 5100 dom cdm 5632 –onto→wfo 6498 ≼ cdom 8893 cardccrd 9859 AC wacn 9862 |
| 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 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| 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 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-se 5586 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-isom 6509 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-er 8645 df-map 8777 df-en 8896 df-dom 8897 df-card 9863 df-acn 9866 |
| This theorem is referenced by: fonum 9980 fodomfi2 9982 infpwfien 9984 inffien 9985 wdomnumr 9986 iunfictbso 10036 infmap2 10139 fictb 10166 cfflb 10181 cfslb2n 10190 fodomg 10444 rankcf 10700 tskuni 10706 tskurn 10712 znnen 16149 qnnen 16150 cygctb 19833 1stcrestlem 23408 2ndcctbss 23411 2ndcomap 23414 2ndcsep 23415 tx1stc 23606 tx2ndc 23607 met1stc 24477 met2ndci 24478 re2ndc 24757 uniiccdif 25547 dyadmbl 25569 opnmblALT 25572 mbfimaopnlem 25624 aannenlem3 26306 rn1st 45628 |
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