# Multiplicity of an eigen value , k = dim[ Null(T - k I)^( dim V) ]

by vish_maths
Tags: eigen, multiplicity, nullt
But the nullspace of $\left(\begin{array}{cc} 0 & 0\\ 0 & 0\end{array}\right)$ is $\mathbb{R}^2$ (all vectors are sent to 0). And the dimension of this is 2.