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Mirrors > Home > MPE Home > Th. List > df1o2 | Structured version Visualization version GIF version |
Description: Expanded value of the ordinal number 1. (Contributed by NM, 4-Nov-2002.) |
Ref | Expression |
---|---|
df1o2 | ⊢ 1o = {∅} |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-1o 8180 | . 2 ⊢ 1o = suc ∅ | |
2 | suc0 6265 | . 2 ⊢ suc ∅ = {∅} | |
3 | 1, 2 | eqtri 2759 | 1 ⊢ 1o = {∅} |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1543 ∅c0 4223 {csn 4527 suc csuc 6193 1oc1o 8173 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-ext 2708 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-v 3400 df-dif 3856 df-un 3858 df-nul 4224 df-suc 6197 df-1o 8180 |
This theorem is referenced by: 1oex 8193 df2o3 8195 df2o2 8196 1n0 8199 el1o 8204 dif1o 8205 0we1 8211 oeeui 8308 map0e 8541 ensn1 8672 ensn1OLD 8673 en1 8676 en1OLD 8677 map1 8695 xp1en 8709 pwfiOLD 8949 infxpenlem 9592 fseqenlem1 9603 dju1dif 9751 infdju1 9768 pwdju1 9769 infmap2 9797 cflim2 9842 pwxpndom2 10244 pwdjundom 10246 gchxpidm 10248 wuncval2 10326 tsk1 10343 hashen1 13902 sylow2alem2 18961 psr1baslem 21060 fvcoe1 21082 coe1f2 21084 coe1sfi 21088 coe1add 21139 coe1mul2lem1 21142 coe1mul2lem2 21143 coe1mul2 21144 coe1tm 21148 ply1coe 21171 evls1rhmlem 21191 evl1sca 21204 evl1var 21206 pf1mpf 21222 pf1ind 21225 mat0dimbas0 21317 mavmul0g 21404 hmph0 22646 tdeglem2 24913 deg1ldg 24944 deg1leb 24947 deg1val 24948 fply1 31335 bnj105 32369 bnj96 32512 bnj98 32514 bnj149 32522 rankeq1o 34159 ordcmp 34322 ssoninhaus 34323 onint1 34324 poimirlem28 35491 reheibor 35683 wopprc 40496 pwslnmlem0 40560 pwfi2f1o 40565 lincval0 45372 lco0 45384 linds0 45422 |
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