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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 4281. (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 4281 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ≠ wne 2932 ∅c0 4273 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-dif 3892 df-nul 4274 |
| This theorem is referenced by: vn0ALT 4286 prnz 4721 tpnz 4723 pwne0 5298 onn0 6389 oawordeulem 8489 noinfep 9581 fin23lem31 10265 isfin1-3 10308 omina 10614 nnunb 12433 rpnnen1lem4 12930 rpnnen1lem5 12931 rexfiuz 15310 caurcvg 15639 caurcvg2 15640 caucvg 15641 infcvgaux1i 15822 divalglem2 16364 pc2dvds 16850 vdwmc2 16950 cnsubglem 21396 cnmsubglem 21410 pzriprnglem4 21464 pmatcollpw3 22749 zfbas 23861 nrginvrcn 24657 lebnumlem3 24930 caun0 25248 cnflduss 25323 cnfldcusp 25324 reust 25348 recusp 25349 nulmbl2 25503 itg2seq 25709 itg2monolem1 25717 c1lip1 25964 aannenlem2 26295 logbmpt 26752 tgcgr4 28599 shintcl 31401 chintcl 31403 nmoprepnf 31938 nmfnrepnf 31951 nmcexi 32097 snct 32785 constrext2chnlem 33894 constrfiss 33895 esum0 34193 esumpcvgval 34222 bnj906 35072 satf0 35554 fmla1 35569 prv0 35612 bj-tagn0 37286 taupi 37637 ismblfin 37982 volsupnfl 37986 itg2addnclem 37992 ftc1anc 38022 incsequz 38069 isbnd3 38105 ssbnd 38109 onexomgt 43669 dflim5 43757 corclrcl 44134 imo72b2lem2 44594 imo72b2lem1 44596 imo72b2 44599 amgm2d 44625 nnn0 45807 ren0 45830 ioodvbdlimc1 46361 ioodvbdlimc2 46363 stirlinglem13 46514 fourierdlem103 46637 fourierdlem104 46638 fouriersw 46659 2zlidl 48716 termc2 49993 |
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