Characteristic Sequence

In mathematics, the characteristic sequence of a given sequence s is a sequence of 1s and 0s which tells which elements of s are in some set.

Given two sets and a sequence s = of elements of, the characteristic sequence of is the sequence defined so that if and only if :


c_n =
\begin{cases}
0 & s_n \not \in A, \\
1 & s_n \in A.
\end{cases}


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