Inheritance: Give one class (the child class) all the methods and data of another class (the parent class): An "is a" relationship.

• Textbook:

• Math Example

Vehicle

Car

The class car gets all methods of the vehicle + additional own methods.

Quadratic Extension

F(?d)

Complex Field

C

C = R(?-1) "is a" quadratic extension of R

Specifying a special case from a general concept.

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