###############
# Authored by Weisheng Jiang
# Book 4  |  From Basic Arithmetic to Machine Learning
# Published and copyrighted by Tsinghua University Press
# Beijing, China, 2022
###############

# Bk4_Ch4_09.py

import numpy as np

A = np.matrix([[1,3],
               [2,4]])

print(A**2)

B = np.array([[1,3],
              [2,4]])

print(B**2)