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Mirrors > Home > MPE Home > Th. List > unissb | Structured version Visualization version Unicode version |
Description: Relationship involving membership, subset, and union. Exercise 5 of [Enderton] p. 26 and its converse. (Contributed by NM, 20-Sep-2003.) |
Ref | Expression |
---|---|
unissb |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eluni 4439 | . . . . . 6 | |
2 | 1 | imbi1i 339 | . . . . 5 |
3 | 19.23v 1902 | . . . . 5 | |
4 | 2, 3 | bitr4i 267 | . . . 4 |
5 | 4 | albii 1747 | . . 3 |
6 | alcom 2037 | . . . 4 | |
7 | 19.21v 1868 | . . . . . 6 | |
8 | impexp 462 | . . . . . . . 8 | |
9 | bi2.04 376 | . . . . . . . 8 | |
10 | 8, 9 | bitri 264 | . . . . . . 7 |
11 | 10 | albii 1747 | . . . . . 6 |
12 | dfss2 3591 | . . . . . . 7 | |
13 | 12 | imbi2i 326 | . . . . . 6 |
14 | 7, 11, 13 | 3bitr4i 292 | . . . . 5 |
15 | 14 | albii 1747 | . . . 4 |
16 | 6, 15 | bitri 264 | . . 3 |
17 | 5, 16 | bitri 264 | . 2 |
18 | dfss2 3591 | . 2 | |
19 | df-ral 2917 | . 2 | |
20 | 17, 18, 19 | 3bitr4i 292 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 wal 1481 wex 1704 wcel 1990 wral 2912 wss 3574 cuni 4436 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-v 3202 df-in 3581 df-ss 3588 df-uni 4437 |
This theorem is referenced by: uniss2 4470 ssunieq 4472 sspwuni 4611 pwssb 4612 ordunisssuc 5830 sorpssuni 6946 bm2.5ii 7006 sbthlem1 8070 ordunifi 8210 isfinite2 8218 cflim2 9085 fin23lem16 9157 fin23lem29 9163 fin1a2lem11 9232 fin1a2lem13 9234 itunitc 9243 zorng 9326 wuncval2 9569 suplem1pr 9874 suplem2pr 9875 mrcuni 16281 ipodrsfi 17163 mrelatlub 17186 subgint 17618 efgval 18130 toponmre 20897 neips 20917 neiuni 20926 alexsubALTlem2 21852 alexsubALTlem3 21853 tgpconncompeqg 21915 unidmvol 23309 tglnunirn 25443 uniinn0 29366 locfinreflem 29907 sxbrsigalem0 30333 dya2iocuni 30345 dya2iocucvr 30346 carsguni 30370 topjoin 32360 fnejoin1 32363 fnejoin2 32364 ovoliunnfl 33451 voliunnfl 33453 volsupnfl 33454 intidl 33828 unichnidl 33830 salexct 40552 setrec1lem2 42435 setrec2fun 42439 |
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