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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 4299. (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 4299 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 ≠ wne 2939 ∅c0 4287 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2702 |
This theorem depends on definitions: df-bi 206 df-an 397 df-tru 1544 df-fal 1554 df-ex 1782 df-sb 2068 df-clab 2709 df-cleq 2723 df-clel 2809 df-ne 2940 df-dif 3916 df-nul 4288 |
This theorem is referenced by: vn0ALT 4304 prnz 4743 tpnz 4745 pwne0 5317 onn0 6387 oawordeulem 8506 noinfep 9605 fin23lem31 10288 isfin1-3 10331 omina 10636 nnunb 12418 rpnnen1lem4 12914 rpnnen1lem5 12915 rexfiuz 15244 caurcvg 15573 caurcvg2 15574 caucvg 15575 infcvgaux1i 15753 divalglem2 16288 pc2dvds 16762 vdwmc2 16862 cnsubglem 20883 cnmsubglem 20897 pmatcollpw3 22170 zfbas 23284 nrginvrcn 24093 lebnumlem3 24363 caun0 24682 cnflduss 24757 cnfldcusp 24758 reust 24782 recusp 24783 nulmbl2 24937 itg2seq 25144 itg2monolem1 25152 c1lip1 25398 aannenlem2 25726 logbmpt 26175 tgcgr4 27536 shintcl 30335 chintcl 30337 nmoprepnf 30872 nmfnrepnf 30885 nmcexi 31031 snct 31698 esum0 32737 esumpcvgval 32766 bnj906 33631 satf0 34053 fmla1 34068 prv0 34111 bj-tagn0 35523 taupi 35867 ismblfin 36192 volsupnfl 36196 itg2addnclem 36202 ftc1anc 36232 incsequz 36280 isbnd3 36316 ssbnd 36320 onexomgt 41633 dflim5 41722 corclrcl 42101 imo72b2lem0 42560 imo72b2lem2 42562 imo72b2lem1 42564 imo72b2 42567 amgm2d 42593 nnn0 43733 ren0 43757 ioodvbdlimc1 44294 ioodvbdlimc2 44296 stirlinglem13 44447 fourierdlem103 44570 fourierdlem104 44571 fouriersw 44592 hoicvr 44909 2zlidl 46352 |
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