Question

when is the null space of a matrix 0?

Answer 1

nevermind i figured it out i think. null space = 0 means there is only the trivial solution in the homogeneous equation Ax=0 right?

Answer 2

Yup, you got it!

Answer 3

ok thank you :)

Answer 4

And to be honest, your answer was a lot simpler than what I was ready to say.