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Mirrors > Home > ILE Home > Th. List > fex | Unicode version |
Description: If the domain of a mapping is a set, the function is a set. (Contributed by NM, 3-Oct-1999.) |
Ref | Expression |
---|---|
fex |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ffn 5377 |
. 2
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2 | fnex 5751 |
. 2
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3 | 1, 2 | sylan 283 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 710 ax-5 1457 ax-7 1458 ax-gen 1459 ax-ie1 1503 ax-ie2 1504 ax-8 1514 ax-10 1515 ax-11 1516 ax-i12 1517 ax-bndl 1519 ax-4 1520 ax-17 1536 ax-i9 1540 ax-ial 1544 ax-i5r 1545 ax-14 2161 ax-ext 2169 ax-coll 4130 ax-sep 4133 ax-pow 4186 ax-pr 4221 |
This theorem depends on definitions: df-bi 117 df-3an 981 df-tru 1366 df-nf 1471 df-sb 1773 df-eu 2039 df-mo 2040 df-clab 2174 df-cleq 2180 df-clel 2183 df-nfc 2318 df-ral 2470 df-rex 2471 df-reu 2472 df-rab 2474 df-v 2751 df-sbc 2975 df-csb 3070 df-un 3145 df-in 3147 df-ss 3154 df-pw 3589 df-sn 3610 df-pr 3611 df-op 3613 df-uni 3822 df-iun 3900 df-br 4016 df-opab 4077 df-mpt 4078 df-id 4305 df-xp 4644 df-rel 4645 df-cnv 4646 df-co 4647 df-dm 4648 df-rn 4649 df-res 4650 df-ima 4651 df-iota 5190 df-fun 5230 df-fn 5231 df-f 5232 df-f1 5233 df-fo 5234 df-f1o 5235 df-fv 5236 |
This theorem is referenced by: fexd 5759 tfrcllembex 6372 tfrcl 6378 f1domg 6771 djudom 7105 difinfsn 7112 iseqf1olemjpcl 10508 iseqf1olemfvp 10510 seq3f1olemqsum 10513 seq3f1olemstep 10514 seq3f1olemp 10515 fihashf1rn 10781 climcvg1nlem 11370 fsum3 11408 fprodseq 11604 cnfldstr 13714 cnfldcj 13719 climcncf 14342 |
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