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| Mirrors > Home > ILE Home > Th. List > prssi | Unicode version | ||
| Description: A pair of elements of a class is a subset of the class. (Contributed by NM, 16-Jan-2015.) |
| Ref | Expression |
|---|---|
| prssi |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | prssg 3835 |
. 2
| |
| 2 | 1 | ibi 176 |
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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2213 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-v 2805 df-un 3205 df-in 3207 df-ss 3214 df-sn 3679 df-pr 3680 |
| This theorem is referenced by: prssd 3837 tpssi 3847 prelpwi 4312 onun2 4594 onintexmid 4677 nnregexmid 4725 rex2dom 7039 en2eqpr 7142 m1expcl2 10886 m1expcl 10887 minmax 11870 xrminmax 11905 1idssfct 12767 subrngin 14308 subrgin 14339 lssincl 14481 unopn 14816 umgrbien 16051 bdop 16591 012of 16713 isomninnlem 16762 trilpolemisumle 16770 trilpolemeq1 16772 trilpolemlt1 16773 iswomninnlem 16782 iswomni0 16784 ismkvnnlem 16785 nconstwlpolemgt0 16797 |
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