| 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 4290. (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 4290 | . 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 2145 ≠ wne 2957 ∅c0 4282 |
| 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 2147 ax-9 2155 ax-ext 2734 |
| 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 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-dif 3905 df-nul 4283 |
| This theorem is used by: vn0ALT 4296 prnz 4741 tpnz 4743 pwne0 5325 onn0 6428 oawordeulem 8545 noinfep 9643 fin23lem31 10349 isfin1-3 10392 omina 10704 nnunb 12528 rpnnen1lem4 13034 rpnnen1lem5 13035 rexfiuz 15439 caurcvg 15768 caurcvg2 15769 caucvg 15770 infcvgaux1i 15950 divalglem2 16491 pc2dvds 16977 vdwmc2 17077 cnsubglem 21635 cnmsubglem 21649 pzriprnglem4 21703 pmatcollpw3 23015 zfbas 24128 nrginvrcn 24924 lebnumlem3 25197 caun0 25515 cnflduss 25590 cnfldcusp 25591 reust 25615 recusp 25616 nulmbl2 25770 itg2seq 25976 itg2monolem1 25984 c1lip1 26231 aannenlem2 26572 logbmpt 27033 tgcgr4 28881 shintcl 31819 chintcl 31821 nmoprepnf 32356 nmfnrepnf 32369 nmcexi 32515 snct 33192 constrext2chnlem 34268 constrfiss 34269 esum0 34567 esumpcvgval 34596 bnj906 35447 satf0 35959 fmla1 35974 prv0 36017 bj-tagn0 37731 taupi 38083 ismblfin 38418 volsupnfl 38422 itg2addnclem 38428 ftc1anc 38458 incsequz 38506 isbnd3 38542 ssbnd 38546 onexomgt 44090 dflim5 44178 corclrcl 44555 imo72b2lem2 45015 imo72b2lem1 45017 imo72b2 45020 amgm2d 45046 nnn0 46215 ren0 46238 ioodvbdlimc1 46769 ioodvbdlimc2 46771 stirlinglem13 46922 fourierdlem103 47045 fourierdlem104 47046 fouriersw 47067 2zlidl 49163 termc2 50452 veronesematrowd 50822 veroquadmodzerod 50825 veroquadnolindfd 50826 |
| Copyright terms: Public domain | W3C validator |