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Mirrors > Home > ILE Home > Th. List > inss2 | Unicode version |
Description: The intersection of two classes is a subset of one of them. Part of Exercise 12 of [TakeutiZaring] p. 18. (Contributed by NM, 27-Apr-1994.) |
Ref | Expression |
---|---|
inss2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | incom 3195 |
. 2
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2 | inss1 3223 |
. 2
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3 | 1, 2 | eqsstr3i 3060 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 666 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-8 1441 ax-10 1442 ax-11 1443 ax-i12 1444 ax-bndl 1445 ax-4 1446 ax-17 1465 ax-i9 1469 ax-ial 1473 ax-i5r 1474 ax-ext 2071 |
This theorem depends on definitions: df-bi 116 df-tru 1293 df-nf 1396 df-sb 1694 df-clab 2076 df-cleq 2082 df-clel 2085 df-nfc 2218 df-v 2624 df-in 3008 df-ss 3015 |
This theorem is referenced by: difin0 3362 bnd2 4016 ordin 4223 relin2 4571 relres 4756 ssrnres 4888 cnvcnv 4898 funinsn 5078 funimaexg 5113 fnresin2 5144 ssimaex 5380 ffvresb 5477 ofrfval 5880 fnofval 5881 ofrval 5882 off 5884 ofres 5885 ofco 5889 offres 5922 tpostpos 6045 smores3 6074 tfrlem5 6095 tfrexlem 6115 erinxp 6382 pmresg 6449 unfiin 6692 ltrelpi 6946 peano5nnnn 7490 peano5nni 8488 rexanuz 10484 structcnvcnv 11573 restsspw 11725 eltg4i 11818 ntrss2 11884 ntrin 11887 isopn3 11888 peano5set 12139 |
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