Eigenvector Check

Problem

Determine whether vector v is an eigenvector of square matrix A.

If A*v = lambda*v for some scalar lambda, return lambda as a float. If v is the zero vector or not an eigenvector, return None.

Hint

Pick a nonzero component of v to read off lambda, then verify every component.

case 1

in: [[[2,0],[0,3]],[1,0]]

expected: 2

case 2

in: [[[2,0],[0,3]],[1,1]]

expected: null

case 3

in: [[[0,1],[1,0]],[1,1]]

expected: 1

case 4

in: [[[0,1],[1,0]],[1,-1]]

expected: -1

Starter codePython

def is_eigenvector(A, v):
    # Your code here
    pass

4 test cases · run your code against them in the editor