| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 11251 | . . . 4 ⊢ +∞ = 𝒫 ∪ ℂ | |
| 2 | pwuninel 8269 | . . . 4 ⊢ ¬ 𝒫 ∪ ℂ ∈ ℂ | |
| 3 | 1, 2 | eqneltri 2881 | . . 3 ⊢ ¬ +∞ ∈ ℂ |
| 4 | recn 11196 | . . 3 ⊢ (+∞ ∈ ℝ → +∞ ∈ ℂ) | |
| 5 | 3, 4 | mto 200 | . 2 ⊢ ¬ +∞ ∈ ℝ |
| 6 | 5 | nelir 3066 | 1 ⊢ +∞ ∉ ℝ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2142 ∉ wnel 3063 𝒫 cpw 4561 ∪ cuni 4871 ℂcc 11104 ℝcr 11105 +∞cpnf 11246 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5256 ax-resscn 11163 |
| This proof depends on definitions: df-bi 210 df-an 401 df-3an 1104 df-tru 1572 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-nel 3064 df-rab 3416 df-v 3456 df-in 3911 df-ss 3921 df-pw 4563 df-uni 4872 df-pnf 11251 |
| This theorem is used by: pnfnre2 11257 renepnf 11263 ltxrlt 11286 nn0nepnf 12591 xrltnr 13150 pnfnlt 13159 xnn0lenn0nn0 13277 hashclb 14401 hasheq0 14406 pcgcd1 16943 pc2dvds 16945 ramtcl2 17077 odhash3 19652 xrsdsreclblem 21574 pnfnei 23388 iccpnfcnv 25114 i1f0rn 25852 |
| Copyright terms: Public domain | W3C validator |