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Mirrors > Home > ILE Home > Th. List > ax-1re | GIF version |
Description: 1 is a real number. Axiom for real and complex numbers, justified by Theorem ax1re 7824. Proofs should use 1re 7919 instead. (Contributed by Jim Kingdon, 13-Jan-2020.) (New usage is discouraged.) |
Ref | Expression |
---|---|
ax-1re | ⊢ 1 ∈ ℝ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c1 7775 | . 2 class 1 | |
2 | cr 7773 | . 2 class ℝ | |
3 | 1, 2 | wcel 2141 | 1 wff 1 ∈ ℝ |
Colors of variables: wff set class |
This axiom is referenced by: 1re 7919 |
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