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Mirrors > Home > ILE Home > Th. List > 1oex | GIF version |
Description: Ordinal 1 is a set. (Contributed by BJ, 4-Jul-2022.) |
Ref | Expression |
---|---|
1oex | ⊢ 1o ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1on 6320 | . 2 ⊢ 1o ∈ On | |
2 | 1 | elexi 2698 | 1 ⊢ 1o ∈ V |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1480 Vcvv 2686 Oncon0 4285 1oc1o 6306 |
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 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-pw 3512 df-sn 3533 df-pr 3534 df-uni 3737 df-tr 4027 df-iord 4288 df-on 4290 df-suc 4293 df-1o 6313 |
This theorem is referenced by: 1lt2o 6339 map1 6706 1domsn 6713 djuexb 6929 djurclr 6935 djurcl 6937 djurf1or 6942 djurf1o 6944 djuss 6955 infnninf 7022 nnnninf 7023 ismkvnex 7029 dju1p1e2 7053 exmidfodomrlemr 7058 exmidfodomrlemrALT 7059 djucomen 7072 djuassen 7073 indpi 7153 prarloclemlt 7304 fxnn0nninf 10214 inftonninf 10217 enctlem 11948 djurclALT 13012 pwle2 13196 |
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