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Mirrors > Home > ILE Home > Th. List > 1n0 | Unicode version |
Description: Ordinal one is not equal to ordinal zero. (Contributed by NM, 26-Dec-2004.) |
Ref | Expression |
---|---|
1n0 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df1o2 6334 |
. 2
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2 | 0ex 4063 |
. . 3
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3 | 2 | snnz 3650 |
. 2
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4 | 1, 3 | eqnetri 2332 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 ax-nul 4062 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-ne 2310 df-v 2691 df-dif 3078 df-un 3080 df-nul 3369 df-sn 3538 df-suc 4301 df-1o 6321 |
This theorem is referenced by: xp01disj 6338 xp01disjl 6339 djulclb 6948 djuinr 6956 eldju2ndl 6965 djune 6971 updjudhf 6972 updjudhcoinrg 6974 exmidomni 7022 fodjum 7026 fodju0 7027 ismkvnex 7037 mkvprop 7040 omniwomnimkv 7049 1pi 7147 unct 11991 pwle2 13366 subctctexmid 13369 pw1nct 13371 peano3nninf 13376 nninfalllem1 13378 nninfall 13379 nninfsellemeq 13385 nninfsellemqall 13386 nninffeq 13391 |
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