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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 4282. (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 4282 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ≠ wne 2933 ∅c0 4274 |
| 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 2709 |
| 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 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-dif 3893 df-nul 4275 |
| This theorem is referenced by: vn0ALT 4287 prnz 4722 tpnz 4724 pwne0 5294 onn0 6383 oawordeulem 8482 noinfep 9572 fin23lem31 10256 isfin1-3 10299 omina 10605 nnunb 12424 rpnnen1lem4 12921 rpnnen1lem5 12922 rexfiuz 15301 caurcvg 15630 caurcvg2 15631 caucvg 15632 infcvgaux1i 15813 divalglem2 16355 pc2dvds 16841 vdwmc2 16941 cnsubglem 21405 cnmsubglem 21420 pzriprnglem4 21474 pmatcollpw3 22759 zfbas 23871 nrginvrcn 24667 lebnumlem3 24940 caun0 25258 cnflduss 25333 cnfldcusp 25334 reust 25358 recusp 25359 nulmbl2 25513 itg2seq 25719 itg2monolem1 25727 c1lip1 25974 aannenlem2 26306 logbmpt 26765 tgcgr4 28613 shintcl 31416 chintcl 31418 nmoprepnf 31953 nmfnrepnf 31966 nmcexi 32112 snct 32800 constrext2chnlem 33910 constrfiss 33911 esum0 34209 esumpcvgval 34238 bnj906 35088 satf0 35570 fmla1 35585 prv0 35628 bj-tagn0 37302 taupi 37653 ismblfin 37996 volsupnfl 38000 itg2addnclem 38006 ftc1anc 38036 incsequz 38083 isbnd3 38119 ssbnd 38123 onexomgt 43687 dflim5 43775 corclrcl 44152 imo72b2lem2 44612 imo72b2lem1 44614 imo72b2 44617 amgm2d 44643 nnn0 45825 ren0 45848 ioodvbdlimc1 46379 ioodvbdlimc2 46381 stirlinglem13 46532 fourierdlem103 46655 fourierdlem104 46656 fouriersw 46677 2zlidl 48728 termc2 50005 |
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