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Theorem rexri 8383
Description: A standard real is an extended real (inference form.) (Contributed by David Moews, 28-Feb-2017.)
Hypothesis
Ref Expression
rexri.1 𝐴 ∈ ℝ
Assertion
Ref Expression
rexri 𝐴 ∈ ℝ*

Proof of Theorem rexri
StepHypRef Expression
1 rexri.1 . 2 𝐴 ∈ ℝ
2 rexr 8371 . 2 (𝐴 ∈ ℝ → 𝐴 ∈ ℝ*)
31, 2ax-mp 5 1 𝐴 ∈ ℝ*
Colors of variables:    wff set class
This proof depends on syntax axioms:  wcel 2209  cr 8178  *cxr 8359
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-xr 8364
This theorem is used by:  1xr  8384  cos12dec  12537  halfleoddlt  12663  reeff1oleme  15875  reeff1o  15876  sin0pilem2  15886  neghalfpirx  15898  sincosq1sgn  15930  sincosq2sgn  15931  sincosq4sgn  15933  sinq12gt0  15934  cosq14gt0  15936  cosq23lt0  15937  coseq0q4123  15938  coseq00topi  15939  coseq0negpitopi  15940  cosordlem  15953  cosq34lt1  15954  cos02pilt1  15955  cos0pilt1  15956  ioocosf1o  15958  negpitopissre  15959  iooref1o  17095  taupi  17135
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