0
$\begingroup$

I still can not explain why summation of $exp (iy)$ is equal to zero? why the summation of adding vector is equal to zero?

Improve this question
$\endgroup$

1 Answer 1

Reset to default
1
$\begingroup$

Summing or integrating over a set closed under $y\mapsto\pi+y$ gives $0$, because this mapping multiplies $e^{iy}$ by $-1$.

Improve this answer
$\endgroup$

Not the answer you're looking for? Browse other questions tagged or ask your own question.