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| Mirrors > Home > MPE Home > Th. List > ne0ii | Structured version Visualization version GIF version | ||
| Description: If a class has elements, then it is nonempty. Inference associated with ne0i 4290. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
| Ref | Expression |
|---|---|
| n0ii.1 | ⊢ 𝐴 ∈ 𝐵 |
| Ref | Expression |
|---|---|
| ne0ii | ⊢ 𝐵 ≠ ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | n0ii.1 | . 2 ⊢ 𝐴 ∈ 𝐵 | |
| 2 | ne0i 4290 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 ≠ wne 2959 ∅c0 4281 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-dif 4050 df-nul 4282 |
| This theorem is used by: vn0ALT 4296 prnz 4738 tpnz 4740 pwne0 5323 onn0 6450 oawordeulem 8593 noinfep 9691 fin23lem31 10451 isfin1-3 10494 omina 10806 nnunb 12632 rpnnen1lem4 13138 rpnnen1lem5 13139 rexfiuz 15547 caurcvg 15876 caurcvg2 15877 caucvg 15878 infcvgaux1i 16058 divalglem2 16597 pc2dvds 17089 vdwmc2 17189 cnsubglem 21755 cnmsubglem 21769 pzriprnglem4 21823 pmatcollpw3 23135 zfbas 24248 nrginvrcn 25044 lebnumlem3 25317 caun0 25635 cnflduss 25710 cnfldcusp 25711 reust 25735 recusp 25736 nulmbl2 25890 itg2seq 26096 itg2monolem1 26104 c1lip1 26350 aannenlem2 26689 logbmpt 27149 tgcgr4 29027 shintcl 31965 chintcl 31967 nmoprepnf 32502 nmfnrepnf 32515 nmcexi 32661 snct 33379 constrext2chnlem 34465 constrfiss 34466 esum0 34764 esumpcvgval 34793 bnj906 35643 j0le 36032 k3n0j0lt 36033 satf0 36317 fmla1 36332 prv0 36375 bj-tagn0 38083 taupi 38449 ismblfin 38784 volsupnfl 38788 itg2addnclem 38794 ftc1anc 38824 incsequz 38885 isbnd3 38921 ssbnd 38925 onexomgt 44446 dflim5 44534 corclrcl 44910 imo72b2lem2 45370 imo72b2lem1 45372 imo72b2 45375 amgm2d 45401 nnn0 46604 ren0 46627 ioodvbdlimc1 47158 ioodvbdlimc2 47160 stirlinglem13 47311 fourierdlem103 47434 fourierdlem104 47435 fouriersw 47456 2zlidl 49552 termc2 50868 veronesematrowd 51293 veroquadmodzerod 51296 veroquadnolindfd 51297 |
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