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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 3924 | . 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 1855 | . . 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 1561 ∃wex 1802 ∈ wcel 2145 ∃wrex 3089 ⊆ wss 3907 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1803 df-rex 3090 df-ss 3924 |
| This theorem is referenced by: ss2rexv 4011 ssn0rex 4314 iunss1 4967 onfr 6389 moriotass 7389 frxp 8110 frfi 9233 fisupcl 9418 supgtoreq 9419 brwdom3 9532 unwdomg 9534 frmin 9709 tcrank 9844 hsmexlem2 10399 pwfseqlem3 10633 grur1 10793 suplem1pr 11025 fimaxre2 12151 fiminre2 12154 suprfinzcl 12701 lbzbi 12951 suprzub 12954 uzsupss 12955 zmin 12959 ssnn0fi 14012 elss2prb 14515 scshwfzeqfzo 14853 rexico 15395 rlim3 15539 rlimclim 15587 caurcvgr 15715 alzdvds 16368 bitsfzolem 16482 pclem 16888 0ram2 17071 0ramcl 17073 symgextfo 19483 lsmless1x 19705 lsmless2x 19706 dprdss 20092 ablfac2 20152 subrgdvds 20662 ssrest 23294 locfincf 23649 fbun 23958 fgss 23991 isucn2 24396 metust 24676 psmetutop 24685 lebnumlem3 25083 lebnum 25084 cfil3i 25389 cfilss 25390 fgcfil 25391 iscau4 25399 ivthle 25576 ivthle2 25577 lhop1lem 26133 lhop2 26135 ply1divex 26255 plyss 26317 dgrlem 26347 elqaa 26444 aannenlem2 26451 reeff1olem 26567 rlimcnp 27088 ftalem3 27197 2sqreultblem 27570 2sqreunnlem1 27571 2sqreunnltblem 27573 pntlem3 27731 madess 28017 addsuniflem 28152 mulsuniflem 28300 tgisline 28854 axcontlem2 29224 frgrwopreg1 30578 frgrwopreg2 30579 shless 31620 xlt2addrd 33016 ssnnssfz 33044 xreceu 33154 archirngz 33422 archiabllem1b 33425 1arithidom 33744 dfufd2lem 33756 locfinreflem 34147 crefss 34156 esumpcvgval 34385 sigaclci 34439 eulerpartlemgvv 34683 eulerpartlemgh 34685 signsply0 34855 iccllysconn 35613 satfvsucsuc 35728 fgmin 36743 knoppndvlem18 36980 poimirlem26 38157 poimirlem30 38161 volsupnfl 38176 cover2 38226 filbcmb 38251 istotbnd3 38282 sstotbnd 38286 heibor1lem 38320 isdrngo2 38469 isdrngo3 38470 qsss1 38806 islsati 39630 paddss1 40453 paddss2 40454 hdmap14lem2a 42503 prjspreln0 43203 pellfundre 43470 pellfundge 43471 pellfundglb 43474 hbtlem3 43716 hbtlem5 43717 itgoss 43752 radcnvrat 44888 uzubico 46140 uzubico2 46142 climleltrp 46248 fourierdlem20 46699 smflimlem2 47344 nndivides2 47976 iccelpart 48037 fmtnofac2 48176 grtriprop 48561 ssnn0ssfz 48980 pgrpgt2nabl 48997 eenglngeehlnmlem1 49368 |
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