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Mirrors > Home > MPE Home > Th. List > 1on | Structured version Visualization version GIF version |
Description: Ordinal 1 is an ordinal number. (Contributed by NM, 29-Oct-1995.) |
Ref | Expression |
---|---|
1on | ⊢ 1o ∈ On |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-1o 8085 | . 2 ⊢ 1o = suc ∅ | |
2 | 0elon 6212 | . . 3 ⊢ ∅ ∈ On | |
3 | 2 | onsuci 7533 | . 2 ⊢ suc ∅ ∈ On |
4 | 1, 3 | eqeltri 2886 | 1 ⊢ 1o ∈ On |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2111 ∅c0 4243 Oncon0 6159 suc csuc 6161 1oc1o 8078 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 ax-un 7441 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3or 1085 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ne 2988 df-ral 3111 df-rex 3112 df-rab 3115 df-v 3443 df-sbc 3721 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-pss 3900 df-nul 4244 df-if 4426 df-pw 4499 df-sn 4526 df-pr 4528 df-tp 4530 df-op 4532 df-uni 4801 df-br 5031 df-opab 5093 df-tr 5137 df-eprel 5430 df-po 5438 df-so 5439 df-fr 5478 df-we 5480 df-ord 6162 df-on 6163 df-suc 6165 df-1o 8085 |
This theorem is referenced by: 1oex 8093 2on 8094 ondif2 8110 2oconcl 8111 fnoe 8118 oesuclem 8133 oecl 8145 o1p1e2 8148 o2p2e4OLD 8150 om1r 8152 oe1m 8154 omword1 8182 omword2 8183 omlimcl 8187 oneo 8190 oewordi 8200 oelim2 8204 oeoa 8206 oeoe 8208 oeeui 8211 oaabs2 8255 enpr2d 8580 sucxpdom 8711 oancom 9098 cnfcom3lem 9150 pm54.43lem 9413 pm54.43 9414 infxpenc 9429 infxpenc2 9433 undjudom 9578 endjudisj 9579 djuen 9580 dju1p1e2 9584 dju1p1e2ALT 9585 xpdjuen 9590 mapdjuen 9591 djuxpdom 9596 djufi 9597 djuinf 9599 infdju1 9600 pwdju1 9601 pwdjudom 9627 isfin4p1 9726 pwxpndom2 10076 wunex2 10149 wuncval2 10158 tsk2 10176 efgmnvl 18832 frgpnabllem1 18986 dmdprdpr 19164 dprdpr 19165 psr1crng 20816 psr1assa 20817 psr1tos 20818 psr1bas 20820 vr1cl2 20822 ply1lss 20825 ply1subrg 20826 ressply1bas2 20857 ressply1add 20859 ressply1mul 20860 ressply1vsca 20861 subrgply1 20862 ply1plusgfvi 20871 psr1ring 20876 psr1lmod 20878 psr1sca 20879 ply1ascl 20887 subrg1ascl 20888 subrg1asclcl 20889 subrgvr1 20890 subrgvr1cl 20891 coe1z 20892 coe1mul2lem1 20896 coe1mul2 20898 coe1tm 20902 evls1val 20944 evls1rhm 20946 evls1sca 20947 evl1val 20953 evl1rhm 20956 evl1sca 20958 evl1var 20960 evls1var 20962 mpfpf1 20975 pf1mpf 20976 pf1ind 20979 xkofvcn 22289 xpstopnlem1 22414 ufildom1 22531 deg1z 24688 deg1addle 24702 deg1vscale 24705 deg1vsca 24706 deg1mulle2 24710 deg1le0 24712 ply1nzb 24723 sltval2 33276 noextendlt 33289 sltsolem1 33293 nosepnelem 33297 nolt02o 33312 rankeq1o 33745 ssoninhaus 33909 onint1 33910 1oequni2o 34785 finxp1o 34809 finxpreclem3 34810 finxpreclem4 34811 finxpreclem5 34812 finxpsuclem 34814 pw2f1ocnv 39978 wepwsolem 39986 pwfi2f1o 40040 sn1dom 40234 pr2dom 40235 tr3dom 40236 clsk1indlem4 40747 ply1ass23l 44790 |
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