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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. |

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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: then I need to use the coefficients in a sum, but if I for example do the following: I get zero. Any idea why this is happening? |

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