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Theorem zxrd 45896
Description: An integer is an extended real number. (Contributed by Glauco Siliprandi, 2-Jan-2022.)
Hypothesis
Ref Expression
zxrd.1 (𝜑𝐴 ∈ ℤ)
Assertion
Ref Expression
zxrd (𝜑𝐴 ∈ ℝ*)

Proof of Theorem zxrd
StepHypRef Expression
1 zxrd.1 . . 3 (𝜑𝐴 ∈ ℤ)
21zred 12624 . 2 (𝜑𝐴 ∈ ℝ)
32rexrd 11186 1 (𝜑𝐴 ∈ ℝ*)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wcel 2119  *cxr 11169  cz 12515
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-ext 2711
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3or 1093  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2718  df-cleq 2731  df-clel 2814  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-ss 3900  df-nul 4262  df-if 4455  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-iota 6441  df-fv 6493  df-ov 7359  df-xr 11174  df-neg 11371  df-z 12516
This theorem is referenced by:  hoicvr  46991
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