Theorem zxrd 45421

Description: An integer is an extended real number. (Contributed by Glauco Siliprandi, 2-Jan-2022.)

Hypothesis

Ref	Expression
zxrd.1	⊢ (𝜑 → 𝐴 ∈ ℤ)

Assertion

Ref	Expression
zxrd	⊢ (𝜑 → 𝐴 ∈ ℝ*)

Proof of Theorem zxrd

Step	Hyp	Ref	Expression
1		zxrd.1	. . 3 ⊢ (𝜑 → 𝐴 ∈ ℤ)
2	1	zred 12705	. 2 ⊢ (𝜑 → 𝐴 ∈ ℝ)
3	2	rexrd 11293	1 ⊢ (𝜑 → 𝐴 ∈ ℝ*)

Syntax hints:   → wi 4   ∈ wcel 2107  ℝ^*cxr 11276  ℤcz 12596

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-ext 2706

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-sb 2064  df-clab 2713  df-cleq 2726  df-clel 2808  df-rab 3420  df-v 3465  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4888  df-br 5124  df-iota 6494  df-fv 6549  df-ov 7416  df-xr 11281  df-neg 11477  df-z 12597

This theorem is referenced by: (None)