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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 8326 | . 2 ⊢ +∞ ∈ ℝ* | |
| 2 | 1 | elexi 2826 | 1 ⊢ +∞ ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 Vcvv 2813 +∞cpnf 8305 ℝ*cxr 8307 |
| 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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-un 4554 ax-cnex 8218 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-rex 2526 df-v 2815 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-uni 3915 df-pnf 8310 df-xr 8312 |
| This theorem is referenced by: mnfxr 8330 elxnn0 9565 elxr 10109 xnn0nnen 10799 fxnn0nninf 10801 nninfct 12737 pc0 13002 |
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