Theorem 1red

Description: The number 1 is real, deduction form. (Contributed by David A. Wheeler, 6-Dec-2018)

	Ref	Expression
Assertion	1red	$$⊢\phi \to 1\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		1re	$$⊢1\in ℝ$$
2	1	a1i	$$⊢\phi \to 1\in ℝ$$