Theorem 1aa

Description: One is algebraic. (Contributed by Ender Ting, 21-Jul-2026)

	Ref	Expression
Assertion	1aa	⊢ 1 ∈ 𝔸

Proof

Step	Hyp	Ref	Expression
1		qssaa	⊢ ℚ ⊆ 𝔸
2		zssq	⊢ ℤ ⊆ ℚ
3		1z	⊢ 1 ∈ ℤ
4	2 3	sselii	⊢ 1 ∈ ℚ
5	1 4	sselii	⊢ 1 ∈ 𝔸