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debguy
Posts:
33
Registered:
4/11/13


Re: Summation in Mathematica
Posted:
Apr 25, 2013 2:52 AM


UnderoverscriptBox[\(\[Sum]\), \(m = \(10\)\), \(10\)]\(\(eigenfunctionsort[n, j]\)[\([m + 11]\)] Exp[I*2*\[Pi]*m*x/dp]\)\),{j,1,21}] // DisplayForm
does not work on my mm v. 4.0 and I'm unsure what's missing. a table or another Sum involving j maybe? I'm getting a \(\) not paired error and missing [.
but as I see it
fun[[m+11]]
necessarily means to take a Part of eigenfunctionsort[n, j] ; which isn't obviously a number, list, or symbol from where I sit.
Ben Blomberg wrote: > Hello All, > > I am trying to understand a piece of code I found but I am stuck on this > summation. This is part of a larger do loop over n. > > UnderoverscriptBox[\(\[Sum]\), \(m = \(10\)\), > \(10\)]\(\(eigenfunctionsort[n, j]\)[\([m + 11]\)] > Exp[I*2*\[Pi]*m*x/dp]\)\),{j,1,21}] > > What I mainly do not understand is what is happening with the [m+11]. Is > that being multiplied with eigen function sort with each step in the sum, > or is that simply adding 11 to m at each step in the sum? > > Thanks Ben



