math:lowest()
returns the node in the specified nodeset with the lowest value (where the lowest value calculated using math:min()
).
A node has this minimum value if converting its string value to a number equals the minimum value.
Note: ???
Syntax
math:lowest(nodeSet)
Parameters

nodeSet
 The nodeset whose lowest value is to be returned.
Returns
A result tree fragment consisting of copies of the nodes returned by math:min()
.
Defined
Gecko support
Supported in Gecko 1.9 and later.