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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 8104 | . 2 ⊢ 1o = suc ∅ | |
2 | suc0 6267 | . 2 ⊢ suc ∅ = {∅} | |
3 | 1, 2 | eqtri 2846 | 1 ⊢ 1o = {∅} |
Colors of variables: wff setvar class |
Syntax hints: = wceq 1537 ∅c0 4293 {csn 4569 suc csuc 6195 1oc1o 8097 |
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-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-v 3498 df-dif 3941 df-un 3943 df-nul 4294 df-suc 6199 df-1o 8104 |
This theorem is referenced by: df2o3 8119 df2o2 8120 1n0 8121 el1o 8126 dif1o 8127 0we1 8133 oeeui 8230 map0e 8448 ensn1 8575 en1 8578 map1 8594 xp1en 8605 pwfi 8821 infxpenlem 9441 fseqenlem1 9452 dju1dif 9600 infdju1 9617 pwdju1 9618 infmap2 9642 cflim2 9687 pwxpndom2 10089 pwdjundom 10091 gchxpidm 10093 wuncval2 10171 tsk1 10188 hashen1 13734 sylow2alem2 18745 psr1baslem 20355 fvcoe1 20377 coe1f2 20379 coe1sfi 20383 coe1add 20434 coe1mul2lem1 20437 coe1mul2lem2 20438 coe1mul2 20439 coe1tm 20443 ply1coe 20466 evls1rhmlem 20486 evl1sca 20499 evl1var 20501 pf1mpf 20517 pf1ind 20520 mat0dimbas0 21077 mavmul0g 21164 hmph0 22405 tdeglem2 24657 deg1ldg 24688 deg1leb 24691 deg1val 24692 fply1 30933 bnj105 31996 bnj96 32139 bnj98 32141 bnj149 32149 rankeq1o 33634 ordcmp 33797 ssoninhaus 33798 onint1 33799 poimirlem28 34922 reheibor 35119 wopprc 39634 pwslnmlem0 39698 pwfi2f1o 39703 lincval0 44477 lco0 44489 linds0 44527 |
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