                             <mi mathvariant="italic">j</mi>
                                <mo>⁢</mo>
                                <mi mathvariant="italic">k</mi>
                            </mrow>
                        </math>
                        components or indices,
                        where
                        <math overflow="scroll"><mi mathvariant="italic">k</mi></math>
                        is the number of components or indices per row,
                        as just comput