Sorting, Searching, and Counting

cupy.sort	Returns a sorted copy of an array with a stable sorting algorithm.
cupy.argsort
cupy.argmax	Returns the indices of the maximum along an axis.
cupy.argmin	Returns the indices of the minimum along an axis.
cupy.count_nonzero	Counts the number of non-zero values in the array.
cupy.nonzero	Return the indices of the elements that are non-zero.
cupy.flatnonzero	Return indices that are non-zero in the flattened version of a.
cupy.where