Complex sentence: For the purpose of this discussion, the array elements are partitioned into "less than" and "greater than or equal to" subarrays, although partitioning into "less than or equal to" and "greater than" subarrays would be equally useful.
Split into simpler sentences: For the purpose of this discussion, the array elements are partitioned into "less than" and "greater than or equal to" subarrays. Partitioning into "less than or equal to" and "greater than" subarrays would be equally useful.