PRETTY_MAT_ID = PRETTY_MAT_A
What are the dimensions of matrix PRETTY_MAT_ID?
\times
DIM_2
The first dimension is the number of rows in the matrix. How many rows does PRETTY_MAT_ID have?
The second dimension is the number of columns in the matrix. How many columns does PRETTY_MAT_ID have?
PRETTY_MAT_ID is a DIM_1 \times DIM_2 matrix.