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Mirrors > Home > ILE Home > Th. List > df1o2 | Unicode version |
Description: Expanded value of the ordinal number 1. (Contributed by NM, 4-Nov-2002.) |
Ref | Expression |
---|---|
df1o2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-1o 6195 |
. 2
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2 | suc0 4247 |
. 2
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3 | 1, 2 | eqtri 2109 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 580 ax-in2 581 ax-io 666 ax-5 1382 ax-7 1383 ax-gen 1384 ax-ie1 1428 ax-ie2 1429 ax-8 1441 ax-10 1442 ax-11 1443 ax-i12 1444 ax-bndl 1445 ax-4 1446 ax-17 1465 ax-i9 1469 ax-ial 1473 ax-i5r 1474 ax-ext 2071 |
This theorem depends on definitions: df-bi 116 df-tru 1293 df-nf 1396 df-sb 1694 df-clab 2076 df-cleq 2082 df-clel 2085 df-nfc 2218 df-v 2622 df-dif 3002 df-un 3004 df-nul 3288 df-suc 4207 df-1o 6195 |
This theorem is referenced by: df2o3 6209 df2o2 6210 1n0 6211 el1o 6215 dif1o 6216 ensn1 6567 en1 6570 map1 6583 xp1en 6593 exmidpw 6678 unfiexmid 6682 0ct 6843 exmidfodomrlemr 6889 exmidfodomrlemrALT 6890 fihashen1 10268 ss1oel2o 12161 pw1dom2 12162 |
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