Theorem nfel2

Description: Hypothesis builder for elementhood, special case. (Contributed by Mario Carneiro, 10-Oct-2016)

	Ref	Expression
Hypothesis	nfeq2.1	⊢ Ⅎ 𝑥 𝐵
Assertion	nfel2	⊢ Ⅎ 𝑥 𝐴 ∈ 𝐵

Proof

Step	Hyp	Ref	Expression
1		nfeq2.1	⊢ Ⅎ 𝑥 𝐵
2		nfcv	⊢ Ⅎ 𝑥 𝐴
3	2 1	nfel	⊢ Ⅎ 𝑥 𝐴 ∈ 𝐵