STEM Lessons for College Students

Change of basis explained simply | Linear algebra makes sense

This video is part of a linear algebra series:
Vectors and Bases:
Matrices and Linear Transforms:
Matrix inverses:

This video is about changing the basis (or coordinate system) of a matrix or a vector. While the change of basis formula is often presented as something to just memorise, we’ll see it’s actually very very straightforward to understand.

Hints for homework:
1. You can do it! Think about what it does to the basis vectors!

  1. Remember, in the original case you first translate the input vector from Bob’s basis to Alice’s so you can apply M_a, then translate back. A similar idea applies, but you need to translate to something M_a can take as input.
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