- #1
Septimra
- 27
- 0
I am doing linear algebra and want to fully understand it, not just pass the class. I was recently taught matrix multiplication and decided to look up how it works. The good part is that I understand the concept. Matrices are a way of representing linear transformations. So matrix multiplication is actually a composition of functions. That is why it is not communicative and it is associative.
But i recently came across this article and I could not follow the math near the middle of the page.
http://nolaymanleftbehind.wordpress.com/2011/07/10/linear-algebra-what-matrices-actually-are/
the matrices that are being multiplied are
[ 2 1 ] [ 1 2 ]
[ 4 3 ] [ 1 0 ]
the basis are w1 and w 2
and w1 = [ 1 0 ]
and w2 = [ 0 1 ]
The author states that all that is needed it to see how the linear transformation affects the basis vectors.
Then it states that f(g(w1)) = f(w1+w2)
How does that work? Where on Earth do you plug in the w1?
Please help
But i recently came across this article and I could not follow the math near the middle of the page.
http://nolaymanleftbehind.wordpress.com/2011/07/10/linear-algebra-what-matrices-actually-are/
the matrices that are being multiplied are
[ 2 1 ] [ 1 2 ]
[ 4 3 ] [ 1 0 ]
the basis are w1 and w 2
and w1 = [ 1 0 ]
and w2 = [ 0 1 ]
The author states that all that is needed it to see how the linear transformation affects the basis vectors.
Then it states that f(g(w1)) = f(w1+w2)
How does that work? Where on Earth do you plug in the w1?
Please help