Sequence Slicing Notation for Last Elements

A matrix is a rectangular array of numbers organized into rows and columns. Given this definition, which of the following correctly uses standard notation to represent a 2x3 matrix (2 rows and 3 columns) containing the integers from 1 to 6?

Matrix Construction

The following expression correctly uses standard notation to represent a 2x2 matrix: { {5, 6}, {7, 8} }

Context Window Slice Notation ($\mathbf{K}_{[i-n_c+1,i]}$)

Column Vector Representation

Row Vector Notation ($k_{j'} \in \mathbf{K}^{[u]}$)

Concatenated Matrix Notation ($\mathbf{W}_h$)

Matrix Slice Notation for a Sequence Window ($\mathbf{K}_{[i-n+1,i]}$)