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Metamath Proof Explorer


Theorem 4rp

Description: 4 is a positive real. (Contributed by SN, 26-Aug-2025)

Ref Expression
Assertion 4rp 4 ∈ ℝ+

Proof

Step Hyp Ref Expression
1 4re 4 ∈ ℝ
2 4pos 0 < 4
3 1 2 elrpii 4 ∈ ℝ+