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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 6584 | . 2 ⊢ 1o ∈ On | |
| 2 | 1 | elexi 2813 | 1 ⊢ 1o ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 Vcvv 2800 Oncon0 4458 1oc1o 6570 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2802 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-pw 3652 df-sn 3673 df-pr 3674 df-uni 3892 df-tr 4186 df-iord 4461 df-on 4463 df-suc 4466 df-1o 6577 |
| This theorem is referenced by: 2oex 6594 1lt2o 6605 map1 6982 modom 6989 rex2dom 6991 1domsn 6996 pw1fin 7095 exmidpw2en 7097 djuexb 7234 djurclr 7240 djurcl 7242 djurf1or 7247 djurf1o 7249 djuss 7260 infnninf 7314 infnninfOLD 7315 ismkvnex 7345 pr2cv1 7391 dju1p1e2 7398 exmidfodomrlemr 7403 exmidfodomrlemrALT 7404 djucomen 7421 djuassen 7422 pw1on 7434 pw1nel3 7439 sucpw1ne3 7440 sucpw1nel3 7441 fmelpw1o 7455 indpi 7552 prarloclemlt 7703 fxnn0nninf 10691 inftonninf 10694 nninfctlemfo 12601 nninfct 12602 enctlem 13043 fnpr2ob 13413 xpsfrnel 13417 djurclALT 16334 bj-charfun 16338 pw1map 16532 pw1mapen 16533 pwle2 16535 pw1nct 16540 pw1dceq 16541 nnnninfex 16560 nninfnfiinf 16561 |
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