Jun 9, 2017 #1 Lapidus Messages 344 Reaction score 12 Where does the 1 in the last line come from? Thank you!
Jun 9, 2017 #2 fresh_42 Staff Emeritus Science Advisor Homework Helper Insights Author 2025 Award Messages 20,819 Reaction score 28,465 Looks like the last sum should start at ##1##, which I guess would be important when integration by parts is used. The term for ##r=0## is somehow special and can be treated separately. Probably a copy+paste error.
Looks like the last sum should start at ##1##, which I guess would be important when integration by parts is used. The term for ##r=0## is somehow special and can be treated separately. Probably a copy+paste error.