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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 11166 | . . . 4 ⊢ +∞ = 𝒫 ∪ ℂ | |
| 2 | pwuninel 8215 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2853 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
| 4 | recn 11114 | . . 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 2113 ∉ wnel 3034 𝒫 cpw 4552 ∪ cuni 4861 ℂcc 11022 ℝcr 11023 +∞cpnf 11161 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-pr 5375 ax-un 7678 ax-resscn 11081 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-nel 3035 df-rab 3398 df-v 3440 df-un 3904 df-in 3906 df-ss 3916 df-pw 4554 df-sn 4579 df-pr 4581 df-uni 4862 df-pnf 11166 |
| This theorem is referenced by: pnfnre2 11172 renepnf 11178 ltxrlt 11201 nn0nepnf 12480 xrltnr 13031 pnfnlt 13040 xnn0lenn0nn0 13158 hashclb 14279 hasheq0 14284 pcgcd1 16803 pc2dvds 16805 ramtcl2 16937 odhash3 19503 xrsdsreclblem 21365 pnfnei 23162 iccpnfcnv 24896 i1f0rn 25637 |
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