For reference, the row_starts array is defined recursively as follows:
row_starts[0] = 0
row_starts[i] = row_starts[i-1] + number of non-zero elements in row[i-1]
For reference, the row_starts array is defined recursively as follows:
row_starts[0] = 0
row_starts[i] = row_starts[i-1] + number of non-zero elements in row[i-1]