The eigenspace of an 
square matrix 
associated with an eigenvalue 
is the null
space of 
.
It consists of the zero vector 
together with all eigenvectors
corresponding to 
.
Its dimension is the geometric
multiplicity of 
.
Eigenspace
See also
Algebraic Multiplicity, Eigen Decomposition, Eigenvalue, Eigenvector, Geometric MultiplicityExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Eigenspace." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Eigenspace.html