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1answer
92 views

About doing an sum

I want to explain this summation to Mathematica, For $a >0$ define $n_u, n_d \in \mathbb{Z}$ such that if $\{ a \} \leq 0.5$ then $n_u = [a]-1$ and $n_d = - [a]$ and if $\{ a \} > 0.5$ then ...
0
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1answer
123 views

Constraint on variables in summation

Is it possible to have a constraint on variables in summation of series just similar to pattern constraint e.g. ...
0
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1answer
196 views

Why does the evaluation of this series fail?

The following series expression holds: ...