Skew-Symmetric Matrix Check

Problem

Return True if matrix A is square and skew-symmetric: A[i][j] == -A[j][i] for all i, j.

A skew-symmetric matrix must have zeros on its diagonal.

Hint

The condition at (i, i) forces each diagonal entry to be 0.

case 1

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

expected: true

case 2

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

expected: true

case 3

in: [[[1,2],[3,4]]]

expected: false

case 4

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

expected: true

Starter codePython

def is_skew_symmetric(A):
    # Your code here
    pass

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