Dear WolframAlpha Community,
How does one declare that a variable is real and two other variables are natural numbers?
I would like to work with this complex fraction:
(1-e^(2 i pi (-j+l+t)))/(1-e^((2 i pi (-j+l+t))/n))
and its modulus
sin^2(pi t) csc^2((pi (-j+l+t))/n)
In the exponents, i = sqrt(-1); t is real; n, l, j are natural numbers; l and j are less than or equal to n.
I could not find answers in WolframAlpha when I searched.