Dave's profile - activity

2022-07-04 13:44:59 +0200	received badge	● Popular Question (source)
2018-05-26 02:02:38 +0200	received badge	● Editor (source)
2018-05-26 01:54:15 +0200	received badge	● Scholar (source)
2018-05-26 01:54:10 +0200	received badge	● Supporter (source)
2018-05-26 01:53:56 +0200	commented answer	Sum using coefficients of a expansion Thank you! I ended up doing a for loop and it worked so your explanation makes sense, I will implement it. Big fan of your work on SageManifolds by the way, thank you for that too.
2018-05-25 07:41:31 +0200	received badge	● Student (source)
2018-05-24 22:38:43 +0200	asked a question	Sum using coefficients of a expansion I'm trying to sum over the coefficients of an expansion but the sum gives zero. I use the taylor method to expand a function f: `f=sin(x) ft=f.taylor(x,0,6)` then I need to use the coefficients in a sum, but if I for example do the following: `sum(x^(i)*ft.coefficient(x,i),i,0,5)` I get zero. Any idea why this is happening?