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Mirrors > Home > MPE Home > Th. List > fodomacn | Structured version Visualization version Unicode version |
Description: A version of fodom 9344 that doesn't require the Axiom of Choice ax-ac 9281. If has choice sequences of length , then any surjection from to can be inverted to an injection the other way. (Contributed by Mario Carneiro, 31-Aug-2015.) |
Ref | Expression |
---|---|
fodomacn | AC |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | foelrn 6378 | . . . . 5 | |
2 | 1 | ralrimiva 2966 | . . . 4 |
3 | fveq2 6191 | . . . . . 6 | |
4 | 3 | eqeq2d 2632 | . . . . 5 |
5 | 4 | acni3 8870 | . . . 4 AC |
6 | 2, 5 | sylan2 491 | . . 3 AC |
7 | simpll 790 | . . . . 5 AC AC | |
8 | acnrcl 8865 | . . . . 5 AC | |
9 | 7, 8 | syl 17 | . . . 4 AC |
10 | simprl 794 | . . . . 5 AC | |
11 | fveq2 6191 | . . . . . . 7 | |
12 | simprr 796 | . . . . . . . 8 AC | |
13 | id 22 | . . . . . . . . . . . 12 | |
14 | fveq2 6191 | . . . . . . . . . . . . 13 | |
15 | 14 | fveq2d 6195 | . . . . . . . . . . . 12 |
16 | 13, 15 | eqeq12d 2637 | . . . . . . . . . . 11 |
17 | 16 | rspccva 3308 | . . . . . . . . . 10 |
18 | id 22 | . . . . . . . . . . . 12 | |
19 | fveq2 6191 | . . . . . . . . . . . . 13 | |
20 | 19 | fveq2d 6195 | . . . . . . . . . . . 12 |
21 | 18, 20 | eqeq12d 2637 | . . . . . . . . . . 11 |
22 | 21 | rspccva 3308 | . . . . . . . . . 10 |
23 | 17, 22 | eqeqan12d 2638 | . . . . . . . . 9 |
24 | 23 | anandis 873 | . . . . . . . 8 |
25 | 12, 24 | sylan 488 | . . . . . . 7 AC |
26 | 11, 25 | syl5ibr 236 | . . . . . 6 AC |
27 | 26 | ralrimivva 2971 | . . . . 5 AC |
28 | dff13 6512 | . . . . 5 | |
29 | 10, 27, 28 | sylanbrc 698 | . . . 4 AC |
30 | f1dom2g 7973 | . . . 4 AC | |
31 | 9, 7, 29, 30 | syl3anc 1326 | . . 3 AC |
32 | 6, 31 | exlimddv 1863 | . 2 AC |
33 | 32 | ex 450 | 1 AC |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wceq 1483 wex 1704 wcel 1990 wral 2912 wrex 2913 cvv 3200 class class class wbr 4653 wf 5884 wf1 5885 wfo 5886 cfv 5888 cdom 7953 AC wacn 8764 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-mpt 4730 df-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-fv 5896 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-map 7859 df-dom 7957 df-acn 8768 |
This theorem is referenced by: fodomnum 8880 iundomg 9363 |
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