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* The arrays {{math|V}} and {{math|COL_INDEX}} are of length {{math|NNZ}}, and contain the non-zero values and the column indices of those values respectively
* {{math|COL_INDEX}} contains the column in which the corresponding entry {{math|V}} is located.
* The array {{math|ROW_INDEX}} is of length {{math|''m'' + 1}} and encodes the index in {{math|V}} and {{math|COL_INDEX}} where the given row starts. This is equivalent to {{math|ROW_INDEX[j]}} encoding the total number of nonzeros above row {{math|j}}. The last element is {{math|NNZ}} , i.e., the fictitious index in {{Math|V}} immediately after the last valid index {{math|NNZ − 1}}.<ref name=
For example, the matrix
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