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Mirrors > Home > MPE Home > Th. List > rabeq0 | Structured version Visualization version GIF version |
Description: Condition for a restricted class abstraction to be empty. (Contributed by Jeff Madsen, 7-Jun-2010.) (Revised by BJ, 16-Jul-2021.) |
Ref | Expression |
---|---|
rabeq0 | ⊢ ({𝑥 ∈ 𝐴 ∣ 𝜑} = ∅ ↔ ∀𝑥 ∈ 𝐴 ¬ 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ab0 3905 | . 2 ⊢ ({𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} = ∅ ↔ ∀𝑥 ¬ (𝑥 ∈ 𝐴 ∧ 𝜑)) | |
2 | df-rab 2905 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
3 | 2 | eqeq1i 2615 | . 2 ⊢ ({𝑥 ∈ 𝐴 ∣ 𝜑} = ∅ ↔ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} = ∅) |
4 | raln 2974 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ¬ 𝜑 ↔ ∀𝑥 ¬ (𝑥 ∈ 𝐴 ∧ 𝜑)) | |
5 | 1, 3, 4 | 3bitr4i 291 | 1 ⊢ ({𝑥 ∈ 𝐴 ∣ 𝜑} = ∅ ↔ ∀𝑥 ∈ 𝐴 ¬ 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 ↔ wb 195 ∧ wa 383 ∀wal 1473 = wceq 1475 ∈ wcel 1977 {cab 2596 ∀wral 2896 {crab 2900 ∅c0 3874 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rab 2905 df-v 3175 df-dif 3543 df-nul 3875 |
This theorem is referenced by: rabn0 3912 rabnc 3916 dffr2 5003 frc 5004 frirr 5015 wereu2 5035 tz6.26 5628 fndmdifeq0 6231 fnnfpeq0 6349 wemapso2 8341 wemapwe 8477 hashbclem 13093 hashbc 13094 smuval2 15042 smupvallem 15043 smu01lem 15045 smumullem 15052 phiprmpw 15319 hashgcdeq 15332 prmreclem4 15461 cshws0 15646 pmtrsn 17762 efgsfo 17975 00lsp 18802 dsmm0cl 19903 ordthauslem 20997 pthaus 21251 xkohaus 21266 hmeofval 21371 mumul 24707 musum 24717 ppiub 24729 lgsquadlem2 24906 umgrnloop0 25775 lfgrnloop 25791 usgranloop0 25909 usgra1v 25919 nbusgra 25957 nbgra0nb 25958 nbgra0edg 25961 cusgrasizeindslem1 26002 uvtx0 26019 clwwlkn0 26302 vdgr1b 26431 vdgr1a 26433 vdusgra0nedg 26435 usgravd0nedg 26445 eupath2 26507 vdn0frgrav2 26550 vdgn0frgrav2 26551 frgraregorufr0 26579 2spot0 26591 numclwwlkdisj 26607 numclwwlk3lem 26635 ofldchr 29145 measvuni 29604 dya2iocuni 29672 subfacp1lem6 30421 poimirlem26 32605 poimirlem27 32606 cnambfre 32628 itg2addnclem2 32632 areacirclem5 32674 0dioph 36360 undisjrab 37527 dvnprodlem3 38838 pimltmnf2 39588 pimconstlt0 39591 pimgtpnf2 39594 usgrnloop0ALT 40432 lfuhgr1v0e 40480 nbuhgr 40565 nbumgr 40569 uhgrnbgr0nb 40576 nbgr0vtxlem 40577 vtxd0nedgb 40703 vtxdusgr0edgnelALT 40711 1loopgrnb0 40717 usgrvd0nedg 40749 wwlks 41038 0enwwlksnge1 41060 wspn0 41131 rusgr0edg 41176 clwwlks 41187 clwwlksndisj 41280 vdn0conngrumgrv2 41363 eupth2lemb 41405 eulercrct 41410 frgrregorufr0 41489 av-numclwwlk3lem 41538 rmsupp0 41943 lcoc0 42005 |
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