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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 3907 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
| 2 | pm3.45 623 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → ((𝑥 ∈ 𝐴 ∧ 𝜑) → (𝑥 ∈ 𝐵 ∧ 𝜑))) | |
| 3 | 2 | aleximi 1834 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) → ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑))) |
| 4 | df-rex 3063 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3063 | . . 3 ⊢ (∃𝑥 ∈ 𝐵 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑)) | |
| 6 | 3, 4, 5 | 3imtr4g 296 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| 7 | 1, 6 | sylbi 217 | 1 ⊢ (𝐴 ⊆ 𝐵 → (∃𝑥 ∈ 𝐴 𝜑 → ∃𝑥 ∈ 𝐵 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∀wal 1540 ∃wex 1781 ∈ wcel 2114 ∃wrex 3062 ⊆ wss 3890 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-rex 3063 df-ss 3907 |
| This theorem is referenced by: ss2rexv 3994 ssn0rex 4299 iunss1 4949 onfr 6356 moriotass 7349 frxp 8069 frfi 9188 fisupcl 9376 supgtoreq 9377 brwdom3 9490 unwdomg 9492 frmin 9664 tcrank 9799 hsmexlem2 10340 pwfseqlem3 10574 grur1 10734 suplem1pr 10966 fimaxre2 12092 fiminre2 12095 suprfinzcl 12634 lbzbi 12877 suprzub 12880 uzsupss 12881 zmin 12885 ssnn0fi 13938 elss2prb 14441 scshwfzeqfzo 14779 rexico 15307 rlim3 15451 rlimclim 15499 caurcvgr 15627 alzdvds 16280 bitsfzolem 16394 pclem 16800 0ram2 16983 0ramcl 16985 symgextfo 19388 lsmless1x 19610 lsmless2x 19611 dprdss 19997 ablfac2 20057 subrgdvds 20554 ssrest 23151 locfincf 23506 fbun 23815 fgss 23848 isucn2 24253 metust 24533 psmetutop 24542 lebnumlem3 24940 lebnum 24941 cfil3i 25246 cfilss 25247 fgcfil 25248 iscau4 25256 ivthle 25433 ivthle2 25434 lhop1lem 25990 lhop2 25992 ply1divex 26112 plyss 26174 dgrlem 26204 elqaa 26299 aannenlem2 26306 reeff1olem 26424 rlimcnp 26942 ftalem3 27052 2sqreultblem 27425 2sqreunnlem1 27426 2sqreunnltblem 27428 pntlem3 27586 madess 27872 addsuniflem 28007 mulsuniflem 28155 tgisline 28709 axcontlem2 29048 frgrwopreg1 30403 frgrwopreg2 30404 shless 31445 xlt2addrd 32847 ssnnssfz 32875 xreceu 32996 archirngz 33265 archiabllem1b 33268 1arithidom 33612 dfufd2lem 33624 locfinreflem 34000 crefss 34009 esumpcvgval 34238 sigaclci 34292 eulerpartlemgvv 34536 eulerpartlemgh 34538 signsply0 34711 iccllysconn 35448 satfvsucsuc 35563 fgmin 36568 knoppndvlem18 36805 poimirlem26 37981 poimirlem30 37985 volsupnfl 38000 cover2 38050 filbcmb 38075 istotbnd3 38106 sstotbnd 38110 heibor1lem 38144 isdrngo2 38293 isdrngo3 38294 qsss1 38630 islsati 39454 paddss1 40277 paddss2 40278 hdmap14lem2a 42327 prjspreln0 43056 pellfundre 43327 pellfundge 43328 pellfundglb 43331 hbtlem3 43573 hbtlem5 43574 itgoss 43609 radcnvrat 44759 uzubico 46014 uzubico2 46016 climleltrp 46122 fourierdlem20 46573 smflimlem2 47218 nndivides2 47844 iccelpart 47905 fmtnofac2 48044 grtriprop 48429 ssnn0ssfz 48837 pgrpgt2nabl 48854 eenglngeehlnmlem1 49225 |
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