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Mirrors > Home > ILE Home > Th. List > difexg | Unicode version |
Description: Existence of a difference. (Contributed by NM, 26-May-1998.) |
Ref | Expression |
---|---|
difexg |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | difss 3259 |
. 2
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2 | ssexg 4137 |
. 2
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3 | 1, 2 | mpan 424 |
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-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-ext 2157 ax-sep 4116 |
This theorem depends on definitions: df-bi 117 df-tru 1356 df-nf 1459 df-sb 1761 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-v 2737 df-dif 3129 df-in 3133 df-ss 3140 |
This theorem is referenced by: frirrg 4344 2oconcl 6430 phplem4dom 6852 fidifsnen 6860 findcard 6878 findcard2 6879 findcard2s 6880 fisseneq 6921 difinfsn 7089 ismkvnex 7143 exmidfodomrlemim 7190 |
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