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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 4561 | . . 3 ⊢ (𝑥 ∈ 𝒫 𝐵 ↔ 𝑥 ⊆ 𝐵) | |
| 2 | 1 | ralbii 3108 | . 2 ⊢ (∀𝑥 ∈ 𝐴 𝑥 ∈ 𝒫 𝐵 ↔ ∀𝑥 ∈ 𝐴 𝑥 ⊆ 𝐵) |
| 3 | dfss3 3897 | . 2 ⊢ (𝐴 ⊆ 𝒫 𝐵 ↔ ∀𝑥 ∈ 𝐴 𝑥 ∈ 𝒫 𝐵) | |
| 4 | unissb 4900 | . 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 2144 ∀wral 3076 ⊆ wss 3895 𝒫 cpw 4556 ∪ cuni 4866 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-v 3452 df-ss 3896 df-pw 4558 df-uni 4867 |
| This theorem is used by: pwssb 5060 elpwpw 5061 elpwuni 5064 intss2 5067 rintn0 5068 dftr4 5217 uniixp 8949 fipwss 9421 dffi3 9423 uniwf 9828 numacn 10128 dfac12lem2 10223 fin23lem32 10422 isf34lem4 10455 isf34lem5 10456 fin1a2lem12 10489 itunitc1 10498 fpwwe2lem11 10726 tsksuc 10847 unirnioo 13580 restid 17604 mrcuni 17795 isacs3lem 18716 dmdprdd 20215 dprdfeq0 20238 dprdres 20244 dprdss 20245 dprdz 20246 subgdmdprd 20250 subgdprd 20251 dprd2dlem1 20257 dprd2da 20258 dmdprdsplit2lem 20261 ablfac1b 20286 lssintcl 21239 lbsextlem2 21437 lbsextlem3 21438 cssmre 21999 topgele 23248 topontopn 23258 unitg 23285 fctop 23322 cctop 23324 ppttop 23325 epttop 23327 mretopd 23410 resttopon 23479 ordtuni 23508 conncompcld 23752 islocfin 23836 kgentopon 23857 txuni2 23884 ptuni2 23895 ptbasfi 23900 xkouni 23918 prdstopn 23947 txdis 23951 txcmplem2 23961 xkococnlem 23978 qtoptop2 24018 qtopuni 24021 tgqtop 24031 opnfbas 24161 neifil 24199 filunibas 24200 trfil1 24205 flimfil 24288 cldsubg 24430 tgpconncompeqg 24431 tgpconncomp 24432 tsmsxplem1 24472 utoptop 24553 unirnblps 24738 unirnbl 24739 setsmstopn 24797 tngtopn 24969 bndth 25279 bcthlem5 25649 ovolficcss 25790 ovollb 25800 voliunlem2 25872 voliunlem3 25873 uniioovol 25900 uniioombl 25910 opnmbllem 25922 ubthlem1 31472 hsupcl 31941 hsupss 31943 hsupunss 31945 hsupval2 32011 fnpreimac 33306 unicls 34577 pwsiga 34804 sigainb 34811 insiga 34812 pwldsys 34832 ddemeas 34911 omssubadd 34974 cvmsss2 36081 dfon2lem2 36588 ntruni 37157 clsint2 37159 neibastop1 37189 neibastop2lem 37190 neibastop3 37192 topmeet 37194 topjoin 37195 fnemeet1 37196 fnemeet2 37197 fnejoin1 37198 opnmbllem0 38617 heiborlem1 38788 elrfi 43747 pwpwuni 46116 0ome 47581 |
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