Theorem reccld

Description: Closure law for reciprocal. (Contributed by Mario Carneiro, 27-May-2016)

	Ref	Expression
Hypotheses	div1d.1	⊢ ( 𝜑 → 𝐴 ∈ ℂ )
	reccld.2	⊢ ( 𝜑 → 𝐴 ≠ 0 )
Assertion	reccld	⊢ ( 𝜑 → ( 1 / 𝐴 ) ∈ ℂ )

Proof

Step	Hyp	Ref	Expression
1		div1d.1	⊢ ( 𝜑 → 𝐴 ∈ ℂ )
2		reccld.2	⊢ ( 𝜑 → 𝐴 ≠ 0 )
3		reccl	⊢ ( ( 𝐴 ∈ ℂ ∧ 𝐴 ≠ 0 ) → ( 1 / 𝐴 ) ∈ ℂ )
4	1 2 3	syl2anc	⊢ ( 𝜑 → ( 1 / 𝐴 ) ∈ ℂ )