Metamath Proof Explorer


Theorem 9rp

Description: 9 is a positive real. (Contributed by SN, 26-Aug-2025)

Ref Expression
Assertion 9rp 9 ∈ ℝ+

Proof

Step Hyp Ref Expression
1 9re 9 ∈ ℝ
2 9pos 0 < 9
3 1 2 elrpii 9 ∈ ℝ+