Linear Transformations and Basis

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SUMMARY

The discussion centers on proving that if the set {v_1, ..., v_k} spans a vector space V, then the transformed set {T(v_1), ..., T(v_k)} spans the image T(V) under a linear transformation T. Participants clarify that it is essential to demonstrate that any vector in T(V) can be expressed as T(c_1v_1 + ... + c_kv_k), where c_1, ..., c_k are scalars. This proof relies on understanding the properties of linear transformations and their impact on vector spans.

PREREQUISITES
  • Understanding of linear transformations and their properties
  • Knowledge of vector spaces and spans
  • Familiarity with linear combinations of vectors
  • Basic proficiency in mathematical proofs and notation
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  • Study the properties of linear transformations in detail
  • Learn about the concept of vector space spans and bases
  • Explore examples of linear transformations and their effects on vector sets
  • Practice proving statements about spans and transformations in linear algebra
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Students and educators in linear algebra, mathematicians focusing on vector spaces, and anyone interested in understanding the implications of linear transformations on vector spans.

spratleyj
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Homework Statement



Show that if { v_1, ... , v_k} spans V then {T(v_1), ... , T(v_k)} spans T(v)


Homework Equations





The Attempt at a Solution



So we know that every vector in V can be written as a linear combination of v_1,...v_k thus we only need to show that {T(v_1), ... , T(v_k)} spans T(c_1v_1 + ... + c_kv_k)

However, I'm not sure how to do that.
 
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spratleyj said:

Homework Statement



Show that if { v_1, ... , v_k} spans V then {T(v_1), ... , T(v_k)} spans T(v)

You probably meant to write T(V) here...

we only need to show that {T(v_1), ... , T(v_k)} spans T(c_1v_1 + ... + c_kv_k)

What in Earth does that even mean?

You need to show that \{T(v_1),...,T(v_k)\} spans T(V). So take a vector in T(V) and show that it can be written as

T(c_1v_1 + ... + c_kv_k)
 

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