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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 | df-pnf 11182 | . . . 4 ⊢ +∞ = 𝒫 ∪ ℂ | |
| 2 | pwuninel 8229 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2856 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
| 4 | recn 11130 | . . 3 ⊢ (+∞ ∈ ℝ → +∞ ∈ ℂ) | |
| 5 | 3, 4 | mto 197 | . 2 ⊢ ¬ +∞ ∈ ℝ |
| 6 | 5 | nelir 3040 | 1 ⊢ +∞ ∉ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ∉ wnel 3037 𝒫 cpw 4556 ∪ cuni 4865 ℂcc 11038 ℝcr 11039 +∞cpnf 11177 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5245 ax-pr 5381 ax-un 7692 ax-resscn 11097 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-nel 3038 df-rab 3402 df-v 3444 df-un 3908 df-in 3910 df-ss 3920 df-pw 4558 df-sn 4583 df-pr 4585 df-uni 4866 df-pnf 11182 |
| This theorem is referenced by: pnfnre2 11188 renepnf 11194 ltxrlt 11217 nn0nepnf 12496 xrltnr 13047 pnfnlt 13056 xnn0lenn0nn0 13174 hashclb 14295 hasheq0 14300 pcgcd1 16819 pc2dvds 16821 ramtcl2 16953 odhash3 19522 xrsdsreclblem 21384 pnfnei 23181 iccpnfcnv 24915 i1f0rn 25656 |
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