# Matrix multiplication in C

1. Nov 28, 2004

### tandoorichicken

For a computer program, I have to multiply:
a[][] * b[]
and store it in c[]

how does the math for this work out on paper? What exactly am I multiplying?

2. Nov 28, 2004

### Tide

This is what you're trying to do:

$$c_{i} = \sum_{j = 1}^{N}a_{i, j}b_{j}$$