Eigenvalue
From Conservapedia
It has been suggested that this article or section be merged with eigenvector. (Discuss)
An eigenvalue of a square matrix A is a complex number λ such that
for some non-zero vector 
known as a eigenvector. The eigenvalue is the zero of a matrix's charateristic polynomial.
The span of all the eigenvectors corresponding to a fixed eigenvalue λ is called the eigenspace Eλ of A.
