سوال ۱۶ کنکور ارشد علوم کامپیوتر ۱۴۰۴

PASSAGE 2:

That part of mathematics which is usually called Set Theory encompasses two distinct groups of definitions and results. Firstly, we have those concepts (including that of an infinite set) which are necessary for the development of cardinal numbers and transfinite arithmetic. Such concepts were first introduced into mathematics by Georg Cantor. The second collection of concepts is of a more fundamental nature and deals with the problems of inclusion, membership and classification. It is here that the group which is so often taught as part of a "Modern Mathematics" course, whose development concerns us here. To distinguish between the two groups of concepts we will restore to the last mentioned collection its old name of class theory. To explain the origins of class theory we must go back to the Greeks.

Question: According to paragraph 1, the group of definitions and results which is often taught as part of a modern mathematics course is related to ………… .