1: Sets, Set Relations, and Set Functions
- Page ID
- 50483
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- 1.1: Set Notation and Relations
- Every field of study seeks a common terminology and symbology. While it is possible to think about a subject without knowing its particular language, it is not possible to communicate with others about that subject without some common frame of reference. Thus we begin with the basic terms and notations of set theory.
- 1.2: Basic Set Operations
- Even as set members are discrete, so are sets themselves. The question we ask about each member is, "Of what sets is it entirely a member?" Although there are no partial set memberships, an entity can be entirely a member of more than one set. So, we can perform various operations on sets, such as add one set to another and subtract one set from another. With questions that require a Yes or No response, there is no dual membership since those are on the same hierarchical level.
- 1.3: Cartesian Products and Power Sets
- While the last section discussed combining sets of individual members to create another set of individual members, here we discuss creating sets of non-repeating tuples (pairs, triplets, and higher groupings). Later in the course, we will see how to calculate the number of tuples that would be created under various circumstances.
- 1.4: Summation Notation and Generalizations
- We have dealt with relatively straightforward notation so far. However, as situations involving sets become more complex, a more compact notation is needed. Here presented is an introduction to that notation.