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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 4297. (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 4297 | . 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 2146 ≠ wne 2961 ∅c0 4289 |
| 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 2148 ax-9 2156 ax-ext 2738 |
| 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 2745 df-cleq 2758 df-clel 2841 df-ne 2962 df-dif 3911 df-nul 4290 |
| This theorem is used by: vn0ALT 4303 prnz 4748 tpnz 4750 pwne0 5332 onn0 6434 oawordeulem 8548 noinfep 9639 fin23lem31 10345 isfin1-3 10388 omina 10694 nnunb 12518 rpnnen1lem4 13022 rpnnen1lem5 13023 rexfiuz 15425 caurcvg 15754 caurcvg2 15755 caucvg 15756 infcvgaux1i 15937 divalglem2 16478 pc2dvds 16964 vdwmc2 17064 cnsubglem 21603 cnmsubglem 21617 pzriprnglem4 21671 pmatcollpw3 22978 zfbas 24090 nrginvrcn 24886 lebnumlem3 25159 caun0 25477 cnflduss 25552 cnfldcusp 25553 reust 25577 recusp 25578 nulmbl2 25732 itg2seq 25938 itg2monolem1 25946 c1lip1 26193 aannenlem2 26529 logbmpt 26990 tgcgr4 28837 shintcl 31719 chintcl 31721 nmoprepnf 32256 nmfnrepnf 32269 nmcexi 32415 snct 33094 constrext2chnlem 34171 constrfiss 34172 esum0 34470 esumpcvgval 34499 bnj906 35350 satf0 35885 fmla1 35900 prv0 35943 bj-tagn0 37656 taupi 38008 ismblfin 38353 volsupnfl 38357 itg2addnclem 38363 ftc1anc 38393 incsequz 38440 isbnd3 38476 ssbnd 38480 onexomgt 44009 dflim5 44097 corclrcl 44474 imo72b2lem2 44934 imo72b2lem1 44936 imo72b2 44939 amgm2d 44965 nnn0 46134 ren0 46157 ioodvbdlimc1 46688 ioodvbdlimc2 46690 stirlinglem13 46841 fourierdlem103 46964 fourierdlem104 46965 fouriersw 46986 2zlidl 49046 termc2 50337 |
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