Metamath Proof Explorer


Theorem exp0d

Description: Value of a complex number raised to the 0th power. (Contributed by Mario Carneiro, 28-May-2016)

Ref Expression
Hypothesis expcld.1 φ A
Assertion exp0d φ A 0 = 1

Proof

Step Hyp Ref Expression
1 expcld.1 φ A
2 exp0 A A 0 = 1
3 1 2 syl φ A 0 = 1