Metamath Proof Explorer

Theorem halfcld

Description: Closure of half of a number (frequently used special case). (Contributed by Mario Carneiro, 27-May-2016)

Ref Expression
Hypothesis 2timesd.1 φ A
Assertion halfcld φ A 2


Step Hyp Ref Expression
1 2timesd.1 φ A
2 halfcl A A 2
3 1 2 syl φ A 2