# Notation for the “scalarization” of a vector with a single non-zero entry

Suppose I have a vector $v$ in the complex space $\mathbb{C}^N$ with only a single non-zero element. Is there a standard notation to replace the vector with a scalar equal to the non-zero value of the vector?

Update:

After some thought, I think $v\cdot e_i$ would suffice for this purpose, assuming the index i containing the non-zero element is known. But what if the index is unknown?

You can use the dot product with the vector $(1, \dots, 1)^T$.
I do not think so. Why not use $$s \, e_k =<v,e_k>\,e_k$$ with a canonical vector $(e_k)_i = \delta_{ki}$.