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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 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | difss 3355 |
. 2
| |
| 2 | ssexg 4270 |
. 2
| |
| 3 | 1, 2 | mpan 428 |
1
|
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4247 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-dif 3222 df-in 3226 df-ss 3233 |
| This theorem is referenced by: difexi 4274 difexd 4275 frirrg 4493 2oconcl 6705 phplem4dom 7156 fidifsnen 7165 findcard 7185 findcard2 7186 findcard2s 7187 fisseneq 7235 difinfsn 7433 ismkvnex 7488 exmidfodomrlemim 7546 ballotfilem7 13260 ballotfilem8 13261 |
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