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Theorem pnfnre 11177
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 11172 . . . 4 +∞ = 𝒫
2 pwuninel 8219 . . . 4 ¬ 𝒫 ℂ ∈ ℂ
31, 2eqneltri 2856 . . 3 ¬ +∞ ∈ ℂ
4 recn 11120 . . 3 (+∞ ∈ ℝ → +∞ ∈ ℂ)
53, 4mto 197 . 2 ¬ +∞ ∈ ℝ
65nelir 3040 1 +∞ ∉ ℝ
Colors of variables: wff setvar class
Syntax hints:  wcel 2114  wnel 3037  𝒫 cpw 4555   cuni 4864  cc 11028  cr 11029  +∞cpnf 11167
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 5242  ax-pr 5378  ax-un 7682  ax-resscn 11087
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 3401  df-v 3443  df-un 3907  df-in 3909  df-ss 3919  df-pw 4557  df-sn 4582  df-pr 4584  df-uni 4865  df-pnf 11172
This theorem is referenced by:  pnfnre2  11178  renepnf  11184  ltxrlt  11207  nn0nepnf  12486  xrltnr  13037  pnfnlt  13046  xnn0lenn0nn0  13164  hashclb  14285  hasheq0  14290  pcgcd1  16809  pc2dvds  16811  ramtcl2  16943  odhash3  19509  xrsdsreclblem  21371  pnfnei  23168  iccpnfcnv  24902  i1f0rn  25643
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