NEKG33 Mathematical methods for economists
Chapter 23 : Day 23: Matrix multiplication
By Lund University
Not as simple as multiplying two numbers but not too hard either.
Matrix multiplication
This section is an entirely devoted to matrix multiplication. We look at under which conditions you are allowed to multiply two matrices, the exact method of how to multiply two matrices and all the rules that apply to matrix multiplication.
Dot product
Matrix multiplication, dimension
Matrix multiplication, computation
Matrix multiplication, rules
Matrix multiplication: Problems
Exercises on matrix multiplication