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Mirrors > Home > MPE Home > Th. List > pnfnre | Structured version Visualization version GIF version |
Description: Plus infinity is not a real number. (Contributed by NM, 13-Oct-2005.) |
Ref | Expression |
---|---|
pnfnre | ⊢ +∞ ∉ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pwuninel 7288 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
2 | df-pnf 9955 | . . . . 5 ⊢ +∞ = 𝒫 ∪ ℂ | |
3 | 2 | eleq1i 2679 | . . . 4 ⊢ (+∞ ∈ ℂ ↔ 𝒫 ∪ ℂ ∈ ℂ) |
4 | 1, 3 | mtbir 312 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
5 | recn 9905 | . . 3 ⊢ (+∞ ∈ ℝ → +∞ ∈ ℂ) | |
6 | 4, 5 | mto 187 | . 2 ⊢ ¬ +∞ ∈ ℝ |
7 | 6 | nelir 2886 | 1 ⊢ +∞ ∉ ℝ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 ∉ wnel 2781 𝒫 cpw 4108 ∪ cuni 4372 ℂcc 9813 ℝcr 9814 +∞cpnf 9950 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-resscn 9872 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-nel 2783 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-pw 4110 df-sn 4126 df-pr 4128 df-uni 4373 df-pnf 9955 |
This theorem is referenced by: renepnf 9966 ltxrlt 9987 nn0nepnf 11248 xrltnr 11829 pnfnlt 11838 hashclb 13011 hasheq0 13015 pcgcd1 15419 pc2dvds 15421 ramtcl2 15553 odhash3 17814 xrsdsreclblem 19611 pnfnei 20834 iccpnfcnv 22551 i1f0rn 23255 |
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