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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 11170 | . . . 4 ⊢ +∞ = 𝒫 ∪ ℂ | |
| 2 | pwuninel 8214 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2854 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
| 4 | recn 11117 | . . 3 ⊢ (+∞ ∈ ℝ → +∞ ∈ ℂ) | |
| 5 | 3, 4 | mto 197 | . 2 ⊢ ¬ +∞ ∈ ℝ |
| 6 | 5 | nelir 3037 | 1 ⊢ +∞ ∉ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ∉ wnel 3034 𝒫 cpw 4531 ∪ cuni 4840 ℂcc 11025 ℝcr 11026 +∞cpnf 11165 |
| 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 2707 ax-sep 5220 ax-pr 5364 ax-un 7678 ax-resscn 11084 |
| 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 2714 df-cleq 2727 df-clel 2810 df-nel 3035 df-rab 3388 df-v 3429 df-un 3890 df-in 3892 df-ss 3902 df-pw 4533 df-sn 4558 df-pr 4560 df-uni 4841 df-pnf 11170 |
| This theorem is referenced by: pnfnre2 11176 renepnf 11182 ltxrlt 11205 nn0nepnf 12507 xrltnr 13059 pnfnlt 13068 xnn0lenn0nn0 13186 hashclb 14309 hasheq0 14314 pcgcd1 16837 pc2dvds 16839 ramtcl2 16971 odhash3 19540 xrsdsreclblem 21382 pnfnei 23173 iccpnfcnv 24899 i1f0rn 25637 |
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