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Theorem pnfnre 10705
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 10700 . . . 4 +∞ = 𝒫
2 pwuninel 7944 . . . 4 ¬ 𝒫 ℂ ∈ ℂ
31, 2eqneltri 2844 . . 3 ¬ +∞ ∈ ℂ
4 recn 10650 . . 3 (+∞ ∈ ℝ → +∞ ∈ ℂ)
53, 4mto 200 . 2 ¬ +∞ ∈ ℝ
65nelir 3056 1 +∞ ∉ ℝ
Colors of variables: wff setvar class
Syntax hints:  wcel 2112  wnel 3053  𝒫 cpw 4487   cuni 4791  cc 10558  cr 10559  +∞cpnf 10695
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1912  ax-6 1971  ax-7 2016  ax-8 2114  ax-9 2122  ax-ext 2730  ax-sep 5162  ax-nul 5169  ax-pr 5291  ax-un 7452  ax-resscn 10617
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 846  df-tru 1542  df-ex 1783  df-sb 2071  df-clab 2737  df-cleq 2751  df-clel 2831  df-nel 3054  df-rab 3077  df-v 3409  df-dif 3857  df-un 3859  df-in 3861  df-ss 3871  df-nul 4222  df-pw 4489  df-sn 4516  df-pr 4518  df-uni 4792  df-pnf 10700
This theorem is referenced by:  pnfnre2  10706  renepnf  10712  ltxrlt  10734  nn0nepnf  11999  xrltnr  12540  pnfnlt  12549  xnn0lenn0nn0  12664  hashclb  13754  hasheq0  13759  pcgcd1  16253  pc2dvds  16255  ramtcl2  16387  odhash3  18753  xrsdsreclblem  20197  pnfnei  21905  iccpnfcnv  23630  i1f0rn  24367
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