I wondered how to represent the inner product of two vectors, which the index of the vectors starts with N and goes to infinite. The following mathematical expression which I want to express: $\sum_{i>N}b_i k_i= \mathbf{b}\cdot \mathbf{k}$
As you can see from my expression, I didn't tell the audience that $i$ can go to infinity. Is that any proper way to improve my expression. Thank you in advance.