The set difference A − B contains elements in A that are not in B.
What Is Set Difference?
The set difference A − B contains elements in A that are not in B.
Examples of Set Difference
1
{1,2,3} − {2} = {1,3}.Formula and Key Points
Formula / rule
A − B
- Know the definition and standard notation for Set Difference.
- Be able to recognise or compute set difference in a small example.
- Connect the concept to nearby topics in the same subject before using it in larger CSE problems.
Why This Matters in Computer Science
Used in databases, data structures, automata, logic, query operations, permissions and discrete mathematics.
Related Math Terms
Set Difference: Frequently Asked Questions
What is Set Difference?
The set difference A − B contains elements in A that are not in B.
Why is Set Difference useful in computer science?
Used in databases, data structures, automata, logic, query operations, permissions and discrete mathematics.