Sorting, searching and counting

sort(a[, axis, kind, order])	param a: Tensor to be sorted
argsort(a[, axis, kind, order])	Returns the indices that would sort an array.
argmax(x[, axis, keepdims])	Returns indices of maximum elements obtained by iterating over given axis.
argmin(x[, axis, keepdims])	Returns indices of minimum elements obtained by iterating over given axis.
nonzero(a[, return_matrix])	Returns one of the following:
flatnonzero(a)	Return a vector of indices that are non-zero in the flattened version of a.
searchsorted(x, v[, side, sorter])	Find indices where elements should be inserted to maintain order.
where	if cond then ift else iff Generalizes a scalar Op to tensors.