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Mirrors > Home > MPE Home > Th. List > funcnvsn | Structured version Visualization version Unicode version |
Description: The converse singleton of an ordered pair is a function. This is equivalent to funsn 5939 via cnvsn 5618, but stating it this way allows us to skip the sethood assumptions on and . (Contributed by NM, 30-Apr-2015.) |
Ref | Expression |
---|---|
funcnvsn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | relcnv 5503 | . 2 | |
2 | moeq 3382 | . . . 4 | |
3 | vex 3203 | . . . . . . . 8 | |
4 | vex 3203 | . . . . . . . 8 | |
5 | 3, 4 | brcnv 5305 | . . . . . . 7 |
6 | df-br 4654 | . . . . . . 7 | |
7 | 5, 6 | bitri 264 | . . . . . 6 |
8 | elsni 4194 | . . . . . . 7 | |
9 | 4, 3 | opth1 4944 | . . . . . . 7 |
10 | 8, 9 | syl 17 | . . . . . 6 |
11 | 7, 10 | sylbi 207 | . . . . 5 |
12 | 11 | moimi 2520 | . . . 4 |
13 | 2, 12 | ax-mp 5 | . . 3 |
14 | 13 | ax-gen 1722 | . 2 |
15 | dffun6 5903 | . 2 | |
16 | 1, 14, 15 | mpbir2an 955 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wal 1481 wceq 1483 wcel 1990 wmo 2471 csn 4177 cop 4183 class class class wbr 4653 ccnv 5113 wrel 5119 wfun 5882 |
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-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-id 5024 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-fun 5890 |
This theorem is referenced by: funsng 5937 funcnvpr 5950 funcnvtp 5951 funcnvs1 13657 strlemor1OLD 15969 0spth 26987 |
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