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Theorem pnfnre 11205
Description: Plus infinity is not a real number. (Contributed by NM, 13-Oct-2005.)
Assertion
Ref Expression
pnfnre +∞ ∉ ℝ

Proof of Theorem pnfnre
StepHypRef Expression
1 df-pnf 11200 . . . 4 +∞ = 𝒫
2 pwuninel 8211 . . . 4 ¬ 𝒫 ℂ ∈ ℂ
31, 2eqneltri 2851 . . 3 ¬ +∞ ∈ ℂ
4 recn 11150 . . 3 (+∞ ∈ ℝ → +∞ ∈ ℂ)
53, 4mto 196 . 2 ¬ +∞ ∈ ℝ
65nelir 3048 1 +∞ ∉ ℝ
Colors of variables: wff setvar class
Syntax hints:  wcel 2106  wnel 3045  𝒫 cpw 4565   cuni 4870  cc 11058  cr 11059  +∞cpnf 11195
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 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-ext 2702  ax-sep 5261  ax-pr 5389  ax-un 7677  ax-resscn 11117
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-tru 1544  df-ex 1782  df-sb 2068  df-clab 2709  df-cleq 2723  df-clel 2809  df-nel 3046  df-rab 3406  df-v 3448  df-un 3918  df-in 3920  df-ss 3930  df-pw 4567  df-sn 4592  df-pr 4594  df-uni 4871  df-pnf 11200
This theorem is referenced by:  pnfnre2  11206  renepnf  11212  ltxrlt  11234  nn0nepnf  12502  xrltnr  13049  pnfnlt  13058  xnn0lenn0nn0  13174  hashclb  14268  hasheq0  14273  pcgcd1  16760  pc2dvds  16762  ramtcl2  16894  odhash3  19372  xrsdsreclblem  20880  pnfnei  22608  iccpnfcnv  24344  i1f0rn  25083
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