# Nuclear Fusion Physics and Technology/Algebra summary

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## Contents

#### Definition: Cartesian multiplication[edit]

*Cartesian multiplication* of two sets A, B with |a>,|b> elements is defined as

#### Definition: Projection[edit]

*Projection* f from set A to set B is AxB subset defined as

and notation is used.

#### Definition: Body of numbers[edit]

*Body of numbers* T is defined as

#### Definition: Vector space[edit]

*Vector space* V is defined as

#### Definition: Function[edit]

*Function* is a projection , which meets

#### Definition: Functional[edit]

*Functional* is a projection , which meets

#### Definition: Operator[edit]

*Operator* is a projection , which meets