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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 4302. (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 4302 | . 2 ⊢ (𝐴 ∈ 𝐵 → 𝐵 ≠ ∅) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ 𝐵 ≠ ∅ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 ≠ wne 3018 ∅c0 4293 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-ne 3019 df-dif 3941 df-nul 4294 |
This theorem is referenced by: vn0 4306 prnz 4714 tpnz 4716 pwne0 5259 onn0 6257 oawordeulem 8182 noinfep 9125 fin23lem31 9767 isfin1-3 9810 omina 10115 nnunb 11896 rpnnen1lem4 12382 rpnnen1lem5 12383 rexfiuz 14709 caurcvg 15035 caurcvg2 15036 caucvg 15037 infcvgaux1i 15214 divalglem2 15748 pc2dvds 16217 vdwmc2 16317 cnsubglem 20596 cnmsubglem 20610 pmatcollpw3 21394 zfbas 22506 nrginvrcn 23303 lebnumlem3 23569 caun0 23886 cnflduss 23961 cnfldcusp 23962 reust 23986 recusp 23987 nulmbl2 24139 itg2seq 24345 itg2monolem1 24353 c1lip1 24596 aannenlem2 24920 logbmpt 25368 tgcgr4 26319 shintcl 29109 chintcl 29111 nmoprepnf 29646 nmfnrepnf 29659 nmcexi 29805 snct 30451 esum0 31310 esumpcvgval 31339 bnj906 32204 satf0 32621 fmla1 32636 prv0 32679 bj-tagn0 34293 taupi 34606 ismblfin 34935 volsupnfl 34939 itg2addnclem 34945 ftc1anc 34977 incsequz 35025 isbnd3 35064 ssbnd 35068 corclrcl 40059 imo72b2lem0 40523 imo72b2lem2 40525 imo72b2lem1 40528 imo72b2 40532 amgm2d 40558 nnn0 41654 ren0 41682 ioodvbdlimc1 42225 ioodvbdlimc2 42227 stirlinglem13 42378 fourierdlem103 42501 fourierdlem104 42502 fouriersw 42523 hoicvr 42837 2zlidl 44212 |
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