Typo in the last Big Sigma in the article The index variable is i but inside the sigma we have (-1)^n. It might be difficult to read with (-1)^ i so it might be better to change the index variable to r or n. Reply
The index variable is i but inside the sigma we have (-1)^n. It might be difficult to read with (-1)^ i so it might be better to change the index variable to r or n.