# use \cdots

If the broken line closes to a polygon, then $k_1\!+\!k_2\!+\!\cdots\!+\!k_n = 2$.

Parting words from the person who closed the correction:
Ibid.
Status: Rejected
Reference to the user who closed the correction.:
Reference to the article this correction is about:
Status of the article (was it accepted?):
0
Status of the article (is it closed?):
1
What kind of correction is this:
Meta