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Theorem renepnfd 7940
Description: No (finite) real equals plus infinity. (Contributed by Mario Carneiro, 28-May-2016.)
Hypothesis
Ref Expression
rexrd.1 (𝜑𝐴 ∈ ℝ)
Assertion
Ref Expression
renepnfd (𝜑𝐴 ≠ +∞)

Proof of Theorem renepnfd
StepHypRef Expression
1 rexrd.1 . 2 (𝜑𝐴 ∈ ℝ)
2 renepnf 7937 . 2 (𝐴 ∈ ℝ → 𝐴 ≠ +∞)
31, 2syl 14 1 (𝜑𝐴 ≠ +∞)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2135  wne 2334  cr 7743  +∞cpnf 7921
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1434  ax-7 1435  ax-gen 1436  ax-ie1 1480  ax-ie2 1481  ax-8 1491  ax-10 1492  ax-11 1493  ax-i12 1494  ax-bndl 1496  ax-4 1497  ax-17 1513  ax-i9 1517  ax-ial 1521  ax-i5r 1522  ax-13 2137  ax-14 2138  ax-ext 2146  ax-sep 4094  ax-un 4405  ax-cnex 7835  ax-resscn 7836
This theorem depends on definitions:  df-bi 116  df-tru 1345  df-fal 1348  df-nf 1448  df-sb 1750  df-clab 2151  df-cleq 2157  df-clel 2160  df-nfc 2295  df-ne 2335  df-nel 2430  df-rex 2448  df-rab 2451  df-v 2723  df-in 3117  df-ss 3124  df-pw 3555  df-uni 3784  df-pnf 7926
This theorem is referenced by:  xaddnepnf  9785
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