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Mirrors > Home > MPE Home > Th. List > dfima2 | Structured version Visualization version Unicode version |
Description: Alternate definition of image. Compare definition (d) of [Enderton] p. 44. (Contributed by NM, 19-Apr-2004.) (Proof shortened by Andrew Salmon, 27-Aug-2011.) |
Ref | Expression |
---|---|
dfima2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ima 5127 | . 2 | |
2 | dfrn2 5311 | . 2 | |
3 | vex 3203 | . . . . . . 7 | |
4 | 3 | brres 5402 | . . . . . 6 |
5 | ancom 466 | . . . . . 6 | |
6 | 4, 5 | bitri 264 | . . . . 5 |
7 | 6 | exbii 1774 | . . . 4 |
8 | df-rex 2918 | . . . 4 | |
9 | 7, 8 | bitr4i 267 | . . 3 |
10 | 9 | abbii 2739 | . 2 |
11 | 1, 2, 10 | 3eqtri 2648 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wa 384 wceq 1483 wex 1704 wcel 1990 cab 2608 wrex 2913 class class class wbr 4653 crn 5115 cres 5116 cima 5117 |
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-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-br 4654 df-opab 4713 df-xp 5120 df-cnv 5122 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 |
This theorem is referenced by: dfima3 5469 elimag 5470 imasng 5487 dfimafn 6245 isoini 6588 dffin1-5 9210 dfimafnf 29436 ofpreima 29465 dfaimafn 41245 |
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