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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 8231 | . 2 ⊢ +∞ ∈ ℝ* | |
| 2 | 1 | elexi 2815 | 1 ⊢ +∞ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 Vcvv 2802 +∞cpnf 8210 ℝ*cxr 8212 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-un 4530 ax-cnex 8122 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-pw 3654 df-sn 3675 df-pr 3676 df-uni 3894 df-pnf 8215 df-xr 8217 |
| This theorem is referenced by: mnfxr 8235 elxnn0 9466 elxr 10010 xnn0nnen 10698 fxnn0nninf 10700 nninfct 12611 pc0 12876 |
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