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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 3919 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
| 2 | pm3.45 634 | . . . 4 ⊢ ((𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → ((𝑥 ∈ 𝐴 ∧ 𝜑) → (𝑥 ∈ 𝐵 ∧ 𝜑))) | |
| 3 | 2 | aleximi 1865 | . . 3 ⊢ (∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) → (∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑) → ∃𝑥(𝑥 ∈ 𝐵 ∧ 𝜑))) |
| 4 | df-rex 3089 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3089 | . . 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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 ∀wal 1568 ∃wex 1812 ∈ wcel 2145 ∃wrex 3088 ⊆ wss 3902 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-rex 3089 df-ss 3919 |
| This theorem is used by: ss2rexv 4006 ssn0rex 4309 iunss1 4969 onfr 6401 moriotass 7406 frxp 8128 frfi 9259 fisupcl 9444 supgtoreq 9445 brwdom3 9558 unwdomg 9560 frmin 9735 tcrank 9870 hsmexlem2 10433 pwfseqlem3 10673 grur1 10833 suplem1pr 11065 fimaxre2 12188 fiminre2 12191 suprfinzcl 12739 lbzbi 12989 suprzub 12992 uzsupss 12993 zmin 12997 ssnn0fi 14053 elss2prb 14557 scshwfzeqfzo 14901 rexico 15445 rlim3 15589 rlimclim 15637 caurcvgr 15765 alzdvds 16416 bitsfzolem 16530 pclem 16936 0ram2 17119 0ramcl 17121 symgextfo 19555 lsmless1x 19777 lsmless2x 19778 dprdss 20164 ablfac2 20224 subrgdvds 20754 isdrng3lem2 20921 isdrng5 20923 ssrest 23407 locfincf 23763 fbun 24072 fgss 24105 isucn2 24510 metust 24790 psmetutop 24799 lebnumlem3 25197 lebnum 25198 cfil3i 25503 cfilss 25504 fgcfil 25505 iscau4 25513 ivthle 25690 ivthle2 25691 lhop1lem 26247 lhop2 26249 ply1divex 26369 plyss 26431 dgrlem 26462 elqaa 26561 aannenlem2 26572 reeff1olem 26689 rlimcnp 27210 ftalem3 27319 2sqreultblem 27692 2sqreunnlem1 27693 2sqreunnltblem 27695 pntlem3 27853 madess 28139 addsuniflem 28274 mulsuniflem 28422 tgisline 28982 axcontlem2 29430 frgrwopreg1 30806 frgrwopreg2 30807 shless 31848 xlt2addrd 33238 ssnnssfz 33266 xreceu 33375 archirngz 33637 archiabllem1b 33640 1arithidom 33955 dfufd2lem 33967 locfinreflem 34358 crefss 34367 esumpcvgval 34596 sigaclci 34650 eulerpartlemgvv 34895 eulerpartlemgh 34897 signsply0 35067 iccllysconn 35837 satfvsucsuc 35952 fgmin 36997 knoppndvlem18 37234 poimirlem26 38403 poimirlem30 38407 volsupnfl 38422 cover2 38473 filbcmb 38498 istotbnd3 38529 sstotbnd 38533 heibor1lem 38567 isdrngo2 38716 isdrngo3 38717 qsss1 39051 islsati 39875 paddss1 40698 paddss2 40699 hdmap14lem2a 42748 prjspreln0 43463 pellfundre 43730 pellfundge 43731 pellfundglb 43734 hbtlem3 43976 hbtlem5 43977 itgoss 44012 radcnvrat 45146 uzubico 46404 uzubico2 46406 climleltrp 46512 fourierdlem20 46963 smflimlem2 47608 nndivides2 48280 iccelpart 48341 fmtnofac2 48480 grtriprop 48865 ssnn0ssfz 49287 pgrpgt2nabl 49304 eenglngeehlnmlem1 49675 |
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