Linearity of a linear map

This defining condition says a map T respects vector addition and scalar multiplication, so the image of a combination equals the same combination of images. It is used to check whether a function between vector spaces is linear.

T(\alpha \mathbf{x} + \beta \mathbf{y}) = \alpha T(\mathbf{x}) + \beta T(\mathbf{y})

What the symbols mean

the linear map (a function from one vector space to another)
scalars (real numbers in the stated setting)
vectors in the domain of T

About this formula

  • FieldMathematics
  • TopicLinear algebra
  • LevelUniversity
  • Also calledlinear map definition, linear transformation property, superposition principle, linearity condition, linear mapping property, additivity and homogeneity
  • SourceWikidata Q207643

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