mathematics vs mathematical function

mathematics and mathematical function both are nouns.

Word	Noun	Adjective	Verb	Adverb
mathematics	Yes	No	No	No
mathematical function	Yes	No	No	No

mathematics (noun)	mathematical function (noun)
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement	(mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function)