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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 8368 | . 2 ⊢ +∞ ∈ ℝ* | |
| 2 | 1 | elexi 2834 | 1 ⊢ +∞ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2209 Vcvv 2821 +∞cpnf 8347 ℝ*cxr 8349 |
| 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 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-un 4573 ax-cnex 8260 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rex 2534 df-v 2823 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-uni 3931 df-pnf 8352 df-xr 8354 |
| This theorem is referenced by: mnfxr 8372 elxnn0 9611 elxr 10157 xnn0nnen 10852 fxnn0nninf 10854 nninfct 12796 pc0 13061 |
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