function FT(A, N, φ) {
φ = φ || 0;
return function(x) {
var n = -1, y = 0;
while (++n < N) {
y += A[n] * Math.sin(τ * (n + 1) * x + φ);
}
return y;
}
}
Ctrl-K f * → φ
Ctrl-K t * → τ
Ctrl-K <latin letter> * → <greek equivalent>In emacs it's
C-| tex
\phi → φ
Now we just need to convince other editors to add something similar...
There are other ways of inputting digraphs: C-x 8 RET lets you enter the name of any unicode symbol.
I wrote about the many ways of inputting digraphs and unicode here:
http://www.masteringemacs.org/articles/2010/10/13/diacritics...