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Mirrors > Home > MPE Home > Th. List > dffo4 | Structured version Visualization version Unicode version |
Description: Alternate definition of an onto mapping. (Contributed by NM, 20-Mar-2007.) |
Ref | Expression |
---|---|
dffo4 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dffo2 6119 | . . 3 | |
2 | simpl 473 | . . . 4 | |
3 | vex 3203 | . . . . . . . . . 10 | |
4 | 3 | elrn 5366 | . . . . . . . . 9 |
5 | eleq2 2690 | . . . . . . . . 9 | |
6 | 4, 5 | syl5bbr 274 | . . . . . . . 8 |
7 | 6 | biimpar 502 | . . . . . . 7 |
8 | 7 | adantll 750 | . . . . . 6 |
9 | ffn 6045 | . . . . . . . . . . 11 | |
10 | fnbr 5993 | . . . . . . . . . . . 12 | |
11 | 10 | ex 450 | . . . . . . . . . . 11 |
12 | 9, 11 | syl 17 | . . . . . . . . . 10 |
13 | 12 | ancrd 577 | . . . . . . . . 9 |
14 | 13 | eximdv 1846 | . . . . . . . 8 |
15 | df-rex 2918 | . . . . . . . 8 | |
16 | 14, 15 | syl6ibr 242 | . . . . . . 7 |
17 | 16 | ad2antrr 762 | . . . . . 6 |
18 | 8, 17 | mpd 15 | . . . . 5 |
19 | 18 | ralrimiva 2966 | . . . 4 |
20 | 2, 19 | jca 554 | . . 3 |
21 | 1, 20 | sylbi 207 | . 2 |
22 | fnbrfvb 6236 | . . . . . . . . 9 | |
23 | 22 | biimprd 238 | . . . . . . . 8 |
24 | eqcom 2629 | . . . . . . . 8 | |
25 | 23, 24 | syl6ib 241 | . . . . . . 7 |
26 | 9, 25 | sylan 488 | . . . . . 6 |
27 | 26 | reximdva 3017 | . . . . 5 |
28 | 27 | ralimdv 2963 | . . . 4 |
29 | 28 | imdistani 726 | . . 3 |
30 | dffo3 6374 | . . 3 | |
31 | 29, 30 | sylibr 224 | . 2 |
32 | 21, 31 | impbii 199 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wceq 1483 wex 1704 wcel 1990 wral 2912 wrex 2913 class class class wbr 4653 crn 5115 wfn 5883 wf 5884 wfo 5886 cfv 5888 |
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-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
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-ral 2917 df-rex 2918 df-rab 2921 df-v 3202 df-sbc 3436 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 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-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-fo 5894 df-fv 5896 |
This theorem is referenced by: dffo5 6376 exfo 6377 brdom3 9350 phpreu 33393 poimirlem26 33435 |
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