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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 2955 ∅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 2732 |
| 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 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-dif 3902 df-nul 4280 |
| This theorem is used by: vn0ALT 4293 prnz 4738 tpnz 4740 pwne0 5321 onn0 6424 oawordeulem 8542 noinfep 9640 fin23lem31 10346 isfin1-3 10389 omina 10701 nnunb 12525 rpnnen1lem4 13031 rpnnen1lem5 13032 rexfiuz 15436 caurcvg 15765 caurcvg2 15766 caucvg 15767 infcvgaux1i 15947 divalglem2 16486 pc2dvds 16972 vdwmc2 17072 cnsubglem 21630 cnmsubglem 21644 pzriprnglem4 21698 pmatcollpw3 23010 zfbas 24123 nrginvrcn 24919 lebnumlem3 25192 caun0 25510 cnflduss 25585 cnfldcusp 25586 reust 25610 recusp 25611 nulmbl2 25765 itg2seq 25971 itg2monolem1 25979 c1lip1 26225 aannenlem2 26566 logbmpt 27026 tgcgr4 28874 shintcl 31812 chintcl 31814 nmoprepnf 32349 nmfnrepnf 32362 nmcexi 32508 snct 33185 constrext2chnlem 34261 constrfiss 34262 esum0 34560 esumpcvgval 34589 bnj906 35440 satf0 35952 fmla1 35967 prv0 36010 bj-tagn0 37724 taupi 38076 ismblfin 38411 volsupnfl 38415 itg2addnclem 38421 ftc1anc 38451 incsequz 38499 isbnd3 38535 ssbnd 38539 onexomgt 44083 dflim5 44171 corclrcl 44548 imo72b2lem2 45008 imo72b2lem1 45010 imo72b2 45013 amgm2d 45039 nnn0 46208 ren0 46231 ioodvbdlimc1 46762 ioodvbdlimc2 46764 stirlinglem13 46915 fourierdlem103 47038 fourierdlem104 47039 fouriersw 47060 2zlidl 49156 termc2 50445 veronesematrowd 50815 veroquadmodzerod 50818 veroquadnolindfd 50819 |
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