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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 3925 | . 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 3093 | . . 3 ⊢ (∃𝑥 ∈ 𝐴 𝜑 ↔ ∃𝑥(𝑥 ∈ 𝐴 ∧ 𝜑)) | |
| 5 | df-rex 3093 | . . 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 2146 ∃wrex 3092 ⊆ wss 3908 |
| 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 3093 df-ss 3925 |
| This theorem is used by: ss2rexv 4012 ssn0rex 4316 iunss1 4976 onfr 6407 moriotass 7412 frxp 8131 frfi 9255 fisupcl 9440 supgtoreq 9441 brwdom3 9554 unwdomg 9556 frmin 9731 tcrank 9866 hsmexlem2 10429 pwfseqlem3 10663 grur1 10823 suplem1pr 11055 fimaxre2 12178 fiminre2 12181 suprfinzcl 12728 lbzbi 12978 suprzub 12981 uzsupss 12982 zmin 12986 ssnn0fi 14041 elss2prb 14545 scshwfzeqfzo 14889 rexico 15431 rlim3 15575 rlimclim 15623 caurcvgr 15751 alzdvds 16403 bitsfzolem 16517 pclem 16923 0ram2 17106 0ramcl 17108 symgextfo 19523 lsmless1x 19745 lsmless2x 19746 dprdss 20132 ablfac2 20192 subrgdvds 20722 isdrng3lem2 20889 isdrng5 20891 ssrest 23370 locfincf 23725 fbun 24034 fgss 24067 isucn2 24472 metust 24752 psmetutop 24761 lebnumlem3 25159 lebnum 25160 cfil3i 25465 cfilss 25466 fgcfil 25467 iscau4 25475 ivthle 25652 ivthle2 25653 lhop1lem 26209 lhop2 26211 ply1divex 26331 plyss 26393 dgrlem 26423 elqaa 26520 aannenlem2 26529 reeff1olem 26646 rlimcnp 27167 ftalem3 27276 2sqreultblem 27649 2sqreunnlem1 27650 2sqreunnltblem 27652 pntlem3 27810 madess 28096 addsuniflem 28231 mulsuniflem 28379 tgisline 28937 axcontlem2 29352 frgrwopreg1 30706 frgrwopreg2 30707 shless 31748 xlt2addrd 33141 ssnnssfz 33169 xreceu 33278 archirngz 33540 archiabllem1b 33543 1arithidom 33858 dfufd2lem 33870 locfinreflem 34261 crefss 34270 esumpcvgval 34499 sigaclci 34553 eulerpartlemgvv 34798 eulerpartlemgh 34800 signsply0 34970 iccllysconn 35763 satfvsucsuc 35878 fgmin 36922 knoppndvlem18 37159 poimirlem26 38338 poimirlem30 38342 volsupnfl 38357 cover2 38407 filbcmb 38432 istotbnd3 38463 sstotbnd 38467 heibor1lem 38501 isdrngo2 38650 isdrngo3 38651 qsss1 38985 islsati 39809 paddss1 40632 paddss2 40633 hdmap14lem2a 42682 prjspreln0 43382 pellfundre 43649 pellfundge 43650 pellfundglb 43653 hbtlem3 43895 hbtlem5 43896 itgoss 43931 radcnvrat 45065 uzubico 46323 uzubico2 46325 climleltrp 46431 fourierdlem20 46882 smflimlem2 47527 nndivides2 48162 iccelpart 48223 fmtnofac2 48362 grtriprop 48747 ssnn0ssfz 49170 pgrpgt2nabl 49187 eenglngeehlnmlem1 49558 |
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