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Mirrors > Home > ILE Home > Th. List > resss | Unicode version |
Description: A class includes its restriction. Exercise 15 of [TakeutiZaring] p. 25. (Contributed by NM, 2-Aug-1994.) |
Ref | Expression |
---|---|
resss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-res 4616 | . 2 | |
2 | inss1 3342 | . 2 | |
3 | 1, 2 | eqsstri 3174 | 1 |
Colors of variables: wff set class |
Syntax hints: cvv 2726 cin 3115 wss 3116 cxp 4602 cres 4606 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-ext 2147 |
This theorem depends on definitions: df-bi 116 df-tru 1346 df-nf 1449 df-sb 1751 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-v 2728 df-in 3122 df-ss 3129 df-res 4616 |
This theorem is referenced by: relssres 4922 resexg 4924 iss 4930 cocnvres 5128 relresfld 5133 relcoi1 5135 funres 5229 funres11 5260 funcnvres 5261 2elresin 5299 fssres 5363 foimacnv 5450 tposss 6214 dftpos4 6231 smores 6260 smores2 6262 caserel 7052 txss12 12906 txbasval 12907 |
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