DynCont#4: SVD, 3Blue1Brown

1.  If determinant is zero, the transformation matrix collapses the input vector to a point in the output vector space
2. A span of the vector is a line , infinite passing through the vector in both the directions. A vector can be multiplied by a constant number and the head of the vector will be somewhere along the line for different constants 
3. Matrix multiplication:
1. Row wise picture, conventional computational approach
2. Column wise picture
3. Transformation from one vector space to another vector space approach
4. Will be edited after listening to the lec again.