Concept
Why is faveSport not injective?
Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk / Chapter 1
"No, because Julie and Sam (and Chuck) all map to the same value (basketball). For a function to be injective, there must be no two do- main elements that map to the same codomain element."
Related Ideas
- How do the examples f₁ through f₆ illustrate function properties?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- What is an injective function?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- What is the domain of faveSport?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- Is the relation still a function after removing (Julie, volleyball)?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- What does the function “faveSport” indicate?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- How can a function be made surjective?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- What is a bijective function?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1
- What is a surjective function?Stephen Davies, Ph.D. Version 2.2.2 Through Discrete Mathematics A Cool Brisk Walk · Chapter 1