Reduces each element in the data aray from all ranks down to a single array that is sent to the root. The reduction is a binary tree reduction - each node reduces itself with it's children, and then sends its result to its parent, finally reaching the root. Elements within the same array are not reduced together, but rather elements at the same index in the different arrays are reduced.

public virtual T[] Reduce<T>(
	int root,
	T[] data,
	ReductionOperation<T> operation,
	TimeSpan timeout
)

Public Overridable Function Reduce(Of T) ( _
	root As Integer, _
	data As T(), _
	operation As ReductionOperation(Of T), _
	timeout As TimeSpan _
) As T()

public:
generic<typename T>
virtual array<T>^ Reduce(
	int root, 
	array<T>^ data, 
	ReductionOperation<T>^ operation, 
	TimeSpan timeout
)