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| Mirrors > Home > MPE Home > Th. List > ssrexv | Structured version Visualization version GIF version | ||
| Description: Existential quantification restricted to a subclass. (Contributed by NM, 11-Jan-2007.) Avoid axioms. (Revised by GG, 19-May-2025.) |
| Ref | Expression |
|---|---|
| ssrexv | ⊢ (𝐴 ⊆ 𝐵 → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-ss 3923 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
| 2 | pm3.45 633 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → ((𝑥 ∈ 𝐴 ∧ 𝜑) → (𝑥 ∈ 𝐵 ∧ 𝜑))) | |
| 3 | 2 | aleximi 1862 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) → ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑))) |
| 4 | df-rex 3090 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3090 | . . 3 ⊢ (∃𝑥 ∈ 𝐵 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑)) | |
| 6 | 3, 4, 5 | 3imtr4g 299 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| 7 | 1, 6 | sylbi 220 | 1 ⊢ (𝐴 ⊆ 𝐵 → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∀wal 1568 ∃wex 1809 ∈ wcel 2143 ∃wrex 3089 ⊆ wss 3906 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-rex 3090 df-ss 3923 |
| This theorem is referenced by: ss2rexv 4010 ssn0rex 4314 iunss1 4972 onfr 6402 moriotass 7401 frxp 8123 frfi 9246 fisupcl 9431 supgtoreq 9432 brwdom3 9545 unwdomg 9547 frmin 9722 tcrank 9857 hsmexlem2 10412 pwfseqlem3 10646 grur1 10806 suplem1pr 11038 fimaxre2 12161 fiminre2 12164 suprfinzcl 12711 lbzbi 12961 suprzub 12964 uzsupss 12965 zmin 12969 ssnn0fi 14023 elss2prb 14527 scshwfzeqfzo 14865 rexico 15407 rlim3 15551 rlimclim 15599 caurcvgr 15727 alzdvds 16379 bitsfzolem 16493 pclem 16899 0ram2 17082 0ramcl 17084 symgextfo 19493 lsmless1x 19715 lsmless2x 19716 dprdss 20102 ablfac2 20162 subrgdvds 20672 ssrest 23314 locfincf 23669 fbun 23978 fgss 24011 isucn2 24416 metust 24696 psmetutop 24705 lebnumlem3 25103 lebnum 25104 cfil3i 25409 cfilss 25410 fgcfil 25411 iscau4 25419 ivthle 25596 ivthle2 25597 lhop1lem 26153 lhop2 26155 ply1divex 26275 plyss 26337 dgrlem 26367 elqaa 26464 aannenlem2 26471 reeff1olem 26587 rlimcnp 27108 ftalem3 27217 2sqreultblem 27590 2sqreunnlem1 27591 2sqreunnltblem 27593 pntlem3 27751 madess 28037 addsuniflem 28172 mulsuniflem 28320 tgisline 28878 axcontlem2 29293 frgrwopreg1 30647 frgrwopreg2 30648 shless 31689 xlt2addrd 33082 ssnnssfz 33110 xreceu 33219 archirngz 33487 archiabllem1b 33490 1arithidom 33805 dfufd2lem 33817 locfinreflem 34208 crefss 34217 esumpcvgval 34446 sigaclci 34500 eulerpartlemgvv 34744 eulerpartlemgh 34746 signsply0 34916 iccllysconn 35720 satfvsucsuc 35835 fgmin 36859 knoppndvlem18 37096 poimirlem26 38275 poimirlem30 38279 volsupnfl 38294 cover2 38344 filbcmb 38369 istotbnd3 38400 sstotbnd 38404 heibor1lem 38438 isdrngo2 38587 isdrngo3 38588 qsss1 38922 islsati 39746 paddss1 40569 paddss2 40570 hdmap14lem2a 42619 prjspreln0 43321 pellfundre 43588 pellfundge 43589 pellfundglb 43592 hbtlem3 43834 hbtlem5 43835 itgoss 43870 radcnvrat 45004 uzubico 46262 uzubico2 46264 climleltrp 46370 fourierdlem20 46821 smflimlem2 47466 nndivides2 48098 iccelpart 48159 fmtnofac2 48298 grtriprop 48683 ssnn0ssfz 49106 pgrpgt2nabl 49123 eenglngeehlnmlem1 49494 |
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