| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 4286. (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 4286 | . 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 2144 ≠ wne 2955 ∅c0 4278 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-dif 4047 df-nul 4279 |
| This theorem is used by: vn0ALT 4292 prnz 4734 tpnz 4736 pwne0 5317 onn0 6429 oawordeulem 8565 noinfep 9664 fin23lem31 10424 isfin1-3 10467 omina 10779 nnunb 12605 rpnnen1lem4 13111 rpnnen1lem5 13112 rexfiuz 15520 caurcvg 15849 caurcvg2 15850 caucvg 15851 infcvgaux1i 16031 divalglem2 16570 pc2dvds 17062 vdwmc2 17162 cnsubglem 21727 cnmsubglem 21741 pzriprnglem4 21795 pmatcollpw3 23107 zfbas 24220 nrginvrcn 25016 lebnumlem3 25289 caun0 25607 cnflduss 25682 cnfldcusp 25683 reust 25707 recusp 25708 nulmbl2 25862 itg2seq 26068 itg2monolem1 26076 c1lip1 26322 aannenlem2 26661 logbmpt 27121 tgcgr4 28999 shintcl 31937 chintcl 31939 nmoprepnf 32474 nmfnrepnf 32487 nmcexi 32633 snct 33352 constrext2chnlem 34428 constrfiss 34429 esum0 34727 esumpcvgval 34756 bnj906 35606 satf0 36223 fmla1 36238 prv0 36281 bj-tagn0 37984 taupi 38337 ismblfin 38672 volsupnfl 38676 itg2addnclem 38682 ftc1anc 38712 incsequz 38775 isbnd3 38811 ssbnd 38815 onexomgt 44336 dflim5 44424 corclrcl 44800 imo72b2lem2 45260 imo72b2lem1 45262 imo72b2 45265 amgm2d 45291 nnn0 46482 ren0 46505 ioodvbdlimc1 47036 ioodvbdlimc2 47038 stirlinglem13 47189 fourierdlem103 47312 fourierdlem104 47313 fouriersw 47334 2zlidl 49430 termc2 50746 veronesematrowd 51149 veroquadmodzerod 51152 veroquadnolindfd 51153 |
| Copyright terms: Public domain | W3C validator |