Homogeneous System has Zero Vector as Solution
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Theorem
Every homogeneous system of linear equations has the zero vector as a solution.
Corollary
Every homogeneous system of linear equations is consistent.
Proof
By the definition of null space, $\mathbf 0$ is a solution if and only if the null space contains the zero vector.
The result follows from Null Space Contains Zero Vector.
$\blacksquare$