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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 11178 | . . . 4 ⊢ +∞ = 𝒫 ∪ ℂ | |
| 2 | pwuninel 8222 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2856 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
| 4 | recn 11125 | . . 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 4542 ∪ cuni 4851 ℂcc 11033 ℝcr 11034 +∞cpnf 11173 |
| 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 5232 ax-pr 5374 ax-un 7686 ax-resscn 11092 |
| 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 3391 df-v 3432 df-un 3895 df-in 3897 df-ss 3907 df-pw 4544 df-sn 4569 df-pr 4571 df-uni 4852 df-pnf 11178 |
| This theorem is referenced by: pnfnre2 11184 renepnf 11190 ltxrlt 11213 nn0nepnf 12515 xrltnr 13067 pnfnlt 13076 xnn0lenn0nn0 13194 hashclb 14317 hasheq0 14322 pcgcd1 16845 pc2dvds 16847 ramtcl2 16979 odhash3 19548 xrsdsreclblem 21408 pnfnei 23201 iccpnfcnv 24927 i1f0rn 25665 |
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