Theorem 4ne0

Description: The number 4 is nonzero. (Contributed by David A. Wheeler, 5-Dec-2018)

	Ref	Expression
Assertion	4ne0	⊢ 4 ≠ 0

Proof

Step	Hyp	Ref	Expression
1		4re	⊢ 4 ∈ ℝ
2		4pos	⊢ 0 < 4
3	1 2	gt0ne0ii	⊢ 4 ≠ 0