Give an example of a linear map t such that dim null(t) = 3 and dim range(t) =2
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In mathematics, a linear map (also called a linear mapping, linear transformation or, in some contexts, linear function) is a mappingV → W between two modules (including vector spaces) that preserves (in the sense defined below) the operations of addition and scalar multiplication.
An important special case is when V = W, in which case the map is called a linear operator,[1] or an endomorphism of V. Sometimes the term linear function has the same meaning as linear map, while in analytic geometry it does not.
A linear map always maps linear subspaces onto linear subspaces (possibly of a lower dimension);[2] for instance it maps a plane through the origin to a plane, straight line or point. Linear maps can often be represented as matrices, and simple examples include rotation and reflection linear transformations.
In the language of abstract algebra, a linear map is a module homomorphism. In the language of category theory it is a morphismin the category of modules over a given ring.
An important special case is when V = W, in which case the map is called a linear operator,[1] or an endomorphism of V. Sometimes the term linear function has the same meaning as linear map, while in analytic geometry it does not.
A linear map always maps linear subspaces onto linear subspaces (possibly of a lower dimension);[2] for instance it maps a plane through the origin to a plane, straight line or point. Linear maps can often be represented as matrices, and simple examples include rotation and reflection linear transformations.
In the language of abstract algebra, a linear map is a module homomorphism. In the language of category theory it is a morphismin the category of modules over a given ring.
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