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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 3921 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
| 2 | pm3.45 631 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → ((𝑥 ∈ 𝐴 ∧ 𝜑) → (𝑥 ∈ 𝐵 ∧ 𝜑))) | |
| 3 | 2 | aleximi 1851 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) → ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑))) |
| 4 | df-rex 3086 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3086 | . . 3 ⊢ (∃𝑥 ∈ 𝐵 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑)) | |
| 6 | 3, 4, 5 | 3imtr4g 298 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| 7 | 1, 6 | sylbi 219 | 1 ⊢ (𝐴 ⊆ 𝐵 → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 ∀wal 1557 ∃wex 1798 ∈ wcel 2141 ∃wrex 3085 ⊆ wss 3904 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1799 df-rex 3086 df-ss 3921 |
| This theorem is referenced by: ss2rexv 4008 ssn0rex 4310 iunss1 4963 onfr 6381 moriotass 7381 frxp 8101 frfi 9225 fisupcl 9413 supgtoreq 9414 brwdom3 9527 unwdomg 9529 frmin 9704 tcrank 9839 hsmexlem2 10381 pwfseqlem3 10615 grur1 10775 suplem1pr 11007 fimaxre2 12134 fiminre2 12137 suprfinzcl 12684 lbzbi 12934 suprzub 12937 uzsupss 12938 zmin 12942 ssnn0fi 13995 elss2prb 14498 scshwfzeqfzo 14836 rexico 15364 rlim3 15508 rlimclim 15556 caurcvgr 15684 alzdvds 16337 bitsfzolem 16451 pclem 16857 0ram2 17040 0ramcl 17042 symgextfo 19445 lsmless1x 19667 lsmless2x 19668 dprdss 20054 ablfac2 20114 subrgdvds 20615 ssrest 23216 locfincf 23571 fbun 23880 fgss 23913 isucn2 24318 metust 24598 psmetutop 24607 lebnumlem3 25005 lebnum 25006 cfil3i 25311 cfilss 25312 fgcfil 25313 iscau4 25321 ivthle 25498 ivthle2 25499 lhop1lem 26055 lhop2 26057 ply1divex 26177 plyss 26239 dgrlem 26269 elqaa 26363 aannenlem2 26370 reeff1olem 26486 rlimcnp 27007 ftalem3 27116 2sqreultblem 27489 2sqreunnlem1 27490 2sqreunnltblem 27492 pntlem3 27650 madess 27936 addsuniflem 28071 mulsuniflem 28219 tgisline 28773 axcontlem2 29112 frgrwopreg1 30466 frgrwopreg2 30467 shless 31508 xlt2addrd 32911 ssnnssfz 32939 xreceu 33060 archirngz 33330 archiabllem1b 33333 1arithidom 33694 dfufd2lem 33706 locfinreflem 34098 crefss 34107 esumpcvgval 34336 sigaclci 34390 eulerpartlemgvv 34634 eulerpartlemgh 34636 signsply0 34809 iccllysconn 35564 satfvsucsuc 35679 fgmin 36694 knoppndvlem18 36931 poimirlem26 38109 poimirlem30 38113 volsupnfl 38128 cover2 38178 filbcmb 38203 istotbnd3 38234 sstotbnd 38238 heibor1lem 38272 isdrngo2 38421 isdrngo3 38422 qsss1 38758 islsati 39582 paddss1 40405 paddss2 40406 hdmap14lem2a 42455 prjspreln0 43155 pellfundre 43422 pellfundge 43423 pellfundglb 43426 hbtlem3 43668 hbtlem5 43669 itgoss 43704 radcnvrat 44854 uzubico 46106 uzubico2 46108 climleltrp 46214 fourierdlem20 46665 smflimlem2 47310 nndivides2 47942 iccelpart 48003 fmtnofac2 48142 grtriprop 48527 ssnn0ssfz 48935 pgrpgt2nabl 48952 eenglngeehlnmlem1 49323 |
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