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| Mirrors > Home > MPE Home > Th. List > sspwuni | Structured version Visualization version GIF version | ||
| Description: Subclass relationship for power class and union. (Contributed by NM, 18-Jul-2006.) |
| Ref | Expression |
|---|---|
| sspwuni | ⊢ (𝐴 ⊆ 𝒫 𝐵 ↔ ∪ 𝐴 ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | velpw 4565 | . . 3 ⊢ (𝑥 ∈ 𝒫 𝐵 ↔ 𝑥 ⊆ 𝐵) | |
| 2 | 1 | ralbii 3112 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝑥 ∈ 𝒫 𝐵 ↔ ∀𝑥 ∈ 𝐴 𝑥 ⊆ 𝐵) |
| 3 | dfss3 3902 | . 2 ⊢ (𝐴 ⊆ 𝒫 𝐵 ↔ ∀𝑥 ∈ 𝐴 𝑥 ∈ 𝒫 𝐵) | |
| 4 | unissb 4904 | . 2 ⊢ (∪ 𝐴 ⊆ 𝐵 ↔ ∀𝑥 ∈ 𝐴 𝑥 ⊆ 𝐵) | |
| 5 | 2, 3, 4 | 3bitr4i 306 | 1 ⊢ (𝐴 ⊆ 𝒫 𝐵 ↔ ∪ 𝐴 ⊆ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∈ wcel 2147 ∀wral 3080 ⊆ wss 3900 𝒫 cpw 4560 ∪ cuni 4870 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-v 3456 df-ss 3901 df-pw 4562 df-uni 4871 |
| This theorem is used by: pwssb 5064 elpwpw 5065 elpwuni 5068 intss2 5071 rintn0 5072 dftr4 5222 uniixp 8980 fipwss 9451 dffi3 9453 uniwf 9858 numacn 10158 dfac12lem2 10253 fin23lem32 10452 isf34lem4 10485 isf34lem5 10486 fin1a2lem12 10519 itunitc1 10528 fpwwe2lem11 10756 tsksuc 10877 unirnioo 13610 restid 17636 mrcuni 17827 isacs3lem 18748 dmdprdd 20248 dprdfeq0 20271 dprdres 20277 dprdss 20278 dprdz 20279 subgdmdprd 20283 subgdprd 20284 dprd2dlem1 20290 dprd2da 20291 dmdprdsplit2lem 20294 ablfac1b 20319 lssintcl 21272 lbsextlem2 21470 lbsextlem3 21471 cssmre 22032 topgele 23281 topontopn 23291 unitg 23318 fctop 23355 cctop 23357 ppttop 23358 epttop 23360 mretopd 23443 resttopon 23512 ordtuni 23541 conncompcld 23785 islocfin 23869 kgentopon 23890 txuni2 23917 ptuni2 23928 ptbasfi 23933 xkouni 23951 prdstopn 23980 txdis 23984 txcmplem2 23994 xkococnlem 24011 qtoptop2 24051 qtopuni 24054 tgqtop 24064 opnfbas 24194 neifil 24232 filunibas 24233 trfil1 24238 flimfil 24321 cldsubg 24463 tgpconncompeqg 24464 tgpconncomp 24465 tsmsxplem1 24505 utoptop 24586 unirnblps 24771 unirnbl 24772 setsmstopn 24830 tngtopn 25002 bndth 25312 bcthlem5 25682 ovolficcss 25823 ovollb 25833 voliunlem2 25905 voliunlem3 25906 uniioovol 25933 uniioombl 25943 opnmbllem 25955 ubthlem1 31505 hsupcl 31974 hsupss 31976 hsupunss 31978 hsupval2 32044 fnpreimac 33339 reff 34554 unicls 34618 pwsiga 34845 sigainb 34852 insiga 34853 pwldsys 34873 ddemeas 34952 omssubadd 35015 cvmsss2 36219 dfon2lem2 36737 ntruni 37306 clsint2 37308 neibastop1 37338 neibastop2lem 37339 neibastop3 37341 topmeet 37343 topjoin 37344 fnemeet1 37345 fnemeet2 37346 fnejoin1 37347 opnmbllem0 38779 heiborlem1 38948 elrfi 43909 pwpwuni 46290 0ome 47754 |
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