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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 4295. (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 4295 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 ≠ wne 2958 ∅c0 4287 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-dif 3909 df-nul 4288 |
| This theorem is referenced by: vn0ALT 4301 prnz 4744 tpnz 4746 pwne0 5329 onn0 6429 oawordeulem 8540 noinfep 9630 fin23lem31 10328 isfin1-3 10371 omina 10677 nnunb 12501 rpnnen1lem4 13005 rpnnen1lem5 13006 rexfiuz 15401 caurcvg 15730 caurcvg2 15731 caucvg 15732 infcvgaux1i 15913 divalglem2 16454 pc2dvds 16940 vdwmc2 17040 cnsubglem 21547 cnmsubglem 21561 pzriprnglem4 21615 pmatcollpw3 22922 zfbas 24034 nrginvrcn 24830 lebnumlem3 25103 caun0 25421 cnflduss 25496 cnfldcusp 25497 reust 25521 recusp 25522 nulmbl2 25676 itg2seq 25882 itg2monolem1 25890 c1lip1 26137 aannenlem2 26473 logbmpt 26934 tgcgr4 28781 shintcl 31663 chintcl 31665 nmoprepnf 32200 nmfnrepnf 32213 nmcexi 32359 snct 33038 constrext2chnlem 34121 constrfiss 34122 esum0 34420 esumpcvgval 34449 bnj906 35299 satf0 35845 fmla1 35860 prv0 35903 bj-tagn0 37596 taupi 37948 ismblfin 38293 volsupnfl 38297 itg2addnclem 38303 ftc1anc 38333 incsequz 38380 isbnd3 38416 ssbnd 38420 onexomgt 43951 dflim5 44039 corclrcl 44416 imo72b2lem2 44876 imo72b2lem1 44878 imo72b2 44881 amgm2d 44907 nnn0 46076 ren0 46099 ioodvbdlimc1 46630 ioodvbdlimc2 46632 stirlinglem13 46783 fourierdlem103 46906 fourierdlem104 46907 fouriersw 46928 2zlidl 48988 termc2 50279 |
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