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Mirrors > Home > ILE Home > Th. List > snex | GIF version |
Description: A singleton whose element exists is a set. (Contributed by NM, 7-Aug-1994.) (Revised by Mario Carneiro, 24-May-2019.) |
Ref | Expression |
---|---|
snex.1 | ⊢ 𝐴 ∈ V |
Ref | Expression |
---|---|
snex | ⊢ {𝐴} ∈ V |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | snex.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | snexg 4103 | . 2 ⊢ (𝐴 ∈ V → {𝐴} ∈ V) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ {𝐴} ∈ V |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1480 Vcvv 2681 {csn 3522 |
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-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-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-v 2683 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 |
This theorem is referenced by: snelpw 4130 rext 4132 sspwb 4133 intid 4141 euabex 4142 mss 4143 exss 4144 opi1 4149 opeqsn 4169 opeqpr 4170 uniop 4172 snnex 4364 op1stb 4394 dtruex 4469 relop 4684 funopg 5152 fo1st 6048 fo2nd 6049 mapsn 6577 mapsnconst 6581 mapsncnv 6582 mapsnf1o2 6583 elixpsn 6622 ixpsnf1o 6623 ensn1 6683 mapsnen 6698 xpsnen 6708 endisj 6711 xpcomco 6713 xpassen 6717 phplem2 6740 findcard2 6776 findcard2s 6777 ac6sfi 6785 xpfi 6811 djuex 6921 0ct 6985 finomni 7005 exmidfodomrlemim 7050 djuassen 7066 nn0ex 8976 fxnn0nninf 10204 inftonninf 10207 hashxp 10565 reldvg 12806 |
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