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| Mirrors > Home > ILE Home > Th. List > pnfex | GIF version | ||
| Description: Plus infinity exists (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
| Ref | Expression |
|---|---|
| pnfex | ⊢ +∞ ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfxr 8222 | . 2 ⊢ +∞ ∈ ℝ* | |
| 2 | 1 | elexi 2813 | 1 ⊢ +∞ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 Vcvv 2800 +∞cpnf 8201 ℝ*cxr 8203 |
| 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-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-pow 4262 ax-un 4528 ax-cnex 8113 |
| 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-rex 2514 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-uni 3892 df-pnf 8206 df-xr 8208 |
| This theorem is referenced by: mnfxr 8226 elxnn0 9457 elxr 10001 xnn0nnen 10689 fxnn0nninf 10691 nninfct 12602 pc0 12867 |
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