Question

10 collections which are not well defined ​

Answer 1

Well defined” function - What does it mean?

• It usually means that you have to check that the definition provides a unique output value for each input value. ...
• It means the function doesn't depend on the way an element of the domain set is expressed. ...
• A function f : A → B is well defined if for all a ∈ A , f ( a ) ∈ B – Amihai Zivan Dec 14 '13 at 19:51.