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Mirrors > Home > MPE Home > Th. List > ral0 | Structured version Visualization version GIF version |
Description: Vacuous universal quantification is always true. (Contributed by NM, 20-Oct-2005.) |
Ref | Expression |
---|---|
ral0 | ⊢ ∀𝑥 ∈ ∅ 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | noel 4298 | . . 3 ⊢ ¬ 𝑥 ∈ ∅ | |
2 | 1 | pm2.21i 119 | . 2 ⊢ (𝑥 ∈ ∅ → 𝜑) |
3 | 2 | rgen 3150 | 1 ⊢ ∀𝑥 ∈ ∅ 𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 ∀wral 3140 ∅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-ral 3145 df-dif 3941 df-nul 4294 |
This theorem is referenced by: int0 4892 0iin 4989 po0 5492 so0 5511 mpt0 6492 ixp0x 8492 ac6sfi 8764 sup0riota 8931 infpssrlem4 9730 axdc3lem4 9877 0tsk 10179 uzsupss 12343 xrsupsslem 12703 xrinfmsslem 12704 xrsup0 12719 fsuppmapnn0fiubex 13363 swrd0 14022 swrdspsleq 14029 repswsymballbi 14144 cshw1 14186 rexfiuz 14709 lcmf0 15980 2prm 16038 0ssc 17109 0subcat 17110 drsdirfi 17550 0pos 17566 mrelatglb0 17797 sgrp0b 17911 ga0 18430 psgnunilem3 18626 lbsexg 19938 ocv0 20823 mdetunilem9 21231 imasdsf1olem 22985 prdsxmslem2 23141 lebnumlem3 23569 cniccbdd 24064 ovolicc2lem4 24123 c1lip1 24596 ulm0 24981 istrkg2ld 26248 nbgr0vtx 27140 nbgr1vtx 27142 cplgr0 27209 cplgr1v 27214 wwlksn0s 27641 clwwlkn 27806 clwwlkn1 27821 0ewlk 27895 1ewlk 27896 0wlk 27897 0conngr 27973 frgr0v 28043 frgr0 28046 frgr1v 28052 1vwmgr 28057 chocnul 29107 locfinref 31107 esumnul 31309 derang0 32418 unt0 32939 nulsslt 33264 nulssgt 33265 fdc 35022 lub0N 36327 glb0N 36331 0psubN 36887 iso0 40646 fnchoice 41293 eliuniincex 41382 eliincex 41383 limcdm0 41906 2ffzoeq 43535 iccpartiltu 43589 iccpartigtl 43590 0mgm 44048 linds0 44527 |
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