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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 3351 |
. 2
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2 | inss1 3379 |
. 2
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3 | 1, 2 | eqsstrri 3212 |
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-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 |
This theorem depends on definitions: df-bi 117 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-v 2762 df-in 3159 df-ss 3166 |
This theorem is referenced by: difin0 3520 bnd2 4202 ordin 4416 relin2 4778 relres 4970 ssrnres 5108 cnvcnv 5118 funinsn 5303 funimaexg 5338 fnresin2 5369 ssimaex 5618 ffvresb 5721 ofrfval 6139 ofvalg 6140 ofrval 6141 off 6143 ofres 6145 ofco 6149 offres 6187 tpostpos 6317 smores3 6346 tfrlem5 6367 tfrexlem 6387 erinxp 6663 pmresg 6730 unfiin 6982 ltrelpi 7384 peano5nnnn 7952 peano5nni 8985 rexanuz 11132 structcnvcnv 12634 ressbasssd 12687 restsspw 12860 eltg4i 14223 ntrss2 14289 ntrin 14292 isopn3 14293 resttopon 14339 restuni2 14345 cnrest2r 14405 cnptopresti 14406 cnptoprest 14407 lmss 14414 metrest 14674 tgioo 14714 2sqlem8 15210 2sqlem9 15211 peano5set 15432 |
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