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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 4287. (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 4287 | . 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 2145 ≠ wne 2956 ∅c0 4279 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-ne 2957 df-dif 3902 df-nul 4280 |
| This theorem is used by: vn0ALT 4293 prnz 4738 tpnz 4740 pwne0 5318 onn0 6422 oawordeulem 8546 noinfep 9645 fin23lem31 10402 isfin1-3 10445 omina 10757 nnunb 12583 rpnnen1lem4 13089 rpnnen1lem5 13090 rexfiuz 15495 caurcvg 15824 caurcvg2 15825 caucvg 15826 infcvgaux1i 16006 divalglem2 16545 pc2dvds 17037 vdwmc2 17137 cnsubglem 21702 cnmsubglem 21716 pzriprnglem4 21770 pmatcollpw3 23082 zfbas 24195 nrginvrcn 24991 lebnumlem3 25264 caun0 25582 cnflduss 25657 cnfldcusp 25658 reust 25682 recusp 25683 nulmbl2 25837 itg2seq 26043 itg2monolem1 26051 c1lip1 26297 aannenlem2 26638 logbmpt 27098 tgcgr4 28976 shintcl 31914 chintcl 31916 nmoprepnf 32451 nmfnrepnf 32464 nmcexi 32610 snct 33287 constrext2chnlem 34364 constrfiss 34365 esum0 34663 esumpcvgval 34692 bnj906 35543 satf0 36106 fmla1 36121 prv0 36164 bj-tagn0 37862 taupi 38212 ismblfin 38547 volsupnfl 38551 itg2addnclem 38557 ftc1anc 38587 incsequz 38650 isbnd3 38686 ssbnd 38690 onexomgt 44201 dflim5 44289 corclrcl 44666 imo72b2lem2 45126 imo72b2lem1 45128 imo72b2 45131 amgm2d 45157 nnn0 46333 ren0 46356 ioodvbdlimc1 46887 ioodvbdlimc2 46889 stirlinglem13 47040 fourierdlem103 47163 fourierdlem104 47164 fouriersw 47185 2zlidl 49281 termc2 50570 veronesematrowd 50925 veroquadmodzerod 50928 veroquadnolindfd 50929 |
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