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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 3906 | . 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 3062 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3062 | . . 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 3061 ⊆ wss 3889 |
| 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 3062 df-ss 3906 |
| This theorem is referenced by: ss2rexv 3993 ssn0rex 4298 iunss1 4948 onfr 6362 moriotass 7356 frxp 8076 frfi 9195 fisupcl 9383 supgtoreq 9384 brwdom3 9497 unwdomg 9499 frmin 9673 tcrank 9808 hsmexlem2 10349 pwfseqlem3 10583 grur1 10743 suplem1pr 10975 fimaxre2 12101 fiminre2 12104 suprfinzcl 12643 lbzbi 12886 suprzub 12889 uzsupss 12890 zmin 12894 ssnn0fi 13947 elss2prb 14450 scshwfzeqfzo 14788 rexico 15316 rlim3 15460 rlimclim 15508 caurcvgr 15636 alzdvds 16289 bitsfzolem 16403 pclem 16809 0ram2 16992 0ramcl 16994 symgextfo 19397 lsmless1x 19619 lsmless2x 19620 dprdss 20006 ablfac2 20066 subrgdvds 20563 ssrest 23141 locfincf 23496 fbun 23805 fgss 23838 isucn2 24243 metust 24523 psmetutop 24532 lebnumlem3 24930 lebnum 24931 cfil3i 25236 cfilss 25237 fgcfil 25238 iscau4 25246 ivthle 25423 ivthle2 25424 lhop1lem 25980 lhop2 25982 ply1divex 26102 plyss 26164 dgrlem 26194 elqaa 26288 aannenlem2 26295 reeff1olem 26411 rlimcnp 26929 ftalem3 27038 2sqreultblem 27411 2sqreunnlem1 27412 2sqreunnltblem 27414 pntlem3 27572 madess 27858 addsuniflem 27993 mulsuniflem 28141 tgisline 28695 axcontlem2 29034 frgrwopreg1 30388 frgrwopreg2 30389 shless 31430 xlt2addrd 32832 ssnnssfz 32860 xreceu 32981 archirngz 33250 archiabllem1b 33253 1arithidom 33597 dfufd2lem 33609 locfinreflem 33984 crefss 33993 esumpcvgval 34222 sigaclci 34276 eulerpartlemgvv 34520 eulerpartlemgh 34522 signsply0 34695 iccllysconn 35432 satfvsucsuc 35547 fgmin 36552 knoppndvlem18 36789 poimirlem26 37967 poimirlem30 37971 volsupnfl 37986 cover2 38036 filbcmb 38061 istotbnd3 38092 sstotbnd 38096 heibor1lem 38130 isdrngo2 38279 isdrngo3 38280 qsss1 38616 islsati 39440 paddss1 40263 paddss2 40264 hdmap14lem2a 42313 prjspreln0 43042 pellfundre 43309 pellfundge 43310 pellfundglb 43313 hbtlem3 43555 hbtlem5 43556 itgoss 43591 radcnvrat 44741 uzubico 45996 uzubico2 45998 climleltrp 46104 fourierdlem20 46555 smflimlem2 47200 nndivides2 47832 iccelpart 47893 fmtnofac2 48032 grtriprop 48417 ssnn0ssfz 48825 pgrpgt2nabl 48842 eenglngeehlnmlem1 49213 |
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