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Metamath Proof Explorer

Theorem halfpire

Description: _pi / 2 is real. (Contributed by David Moews, 28-Feb-2017)

Ref Expression
Assertion halfpire ( π / 2 ) ∈ ℝ

Proof

Step Hyp Ref Expression
1 pire ⊢ π ∈ ℝ
2 1 rehalfcli ⊢ ( π / 2 ) ∈ ℝ