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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 4296 | . . 3 ⊢ ¬ 𝑥 ∈ ∅ | |
2 | 1 | pm2.21i 119 | . 2 ⊢ (𝑥 ∈ ∅ → 𝜑) |
3 | 2 | rgen 3148 | 1 ⊢ ∀𝑥 ∈ ∅ 𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 ∀wral 3138 ∅c0 4291 |
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 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-ral 3143 df-dif 3939 df-nul 4292 |
This theorem is referenced by: int0 4890 0iin 4987 po0 5490 so0 5509 mpt0 6490 ixp0x 8490 ac6sfi 8762 sup0riota 8929 infpssrlem4 9728 axdc3lem4 9875 0tsk 10177 uzsupss 12341 xrsupsslem 12701 xrinfmsslem 12702 xrsup0 12717 fsuppmapnn0fiubex 13361 swrd0 14020 swrdspsleq 14027 repswsymballbi 14142 cshw1 14184 rexfiuz 14707 lcmf0 15978 2prm 16036 0ssc 17107 0subcat 17108 drsdirfi 17548 0pos 17564 mrelatglb0 17795 sgrp0b 17909 ga0 18428 psgnunilem3 18624 lbsexg 19936 ocv0 20821 mdetunilem9 21229 imasdsf1olem 22983 prdsxmslem2 23139 lebnumlem3 23567 cniccbdd 24062 ovolicc2lem4 24121 c1lip1 24594 ulm0 24979 istrkg2ld 26246 nbgr0vtx 27138 nbgr1vtx 27140 cplgr0 27207 cplgr1v 27212 wwlksn0s 27639 clwwlkn 27804 clwwlkn1 27819 0ewlk 27893 1ewlk 27894 0wlk 27895 0conngr 27971 frgr0v 28041 frgr0 28044 frgr1v 28050 1vwmgr 28055 chocnul 29105 locfinref 31105 esumnul 31307 derang0 32416 unt0 32937 nulsslt 33262 nulssgt 33263 fdc 35035 lub0N 36340 glb0N 36344 0psubN 36900 iso0 40659 fnchoice 41306 eliuniincex 41395 eliincex 41396 limcdm0 41919 2ffzoeq 43548 iccpartiltu 43602 iccpartigtl 43603 0mgm 44061 linds0 44540 |
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