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# Authored by Weisheng Jiang
# Book 4  |  From Basic Arithmetic to Machine Learning
# Published and copyrighted by Tsinghua University Press
# Beijing, China, 2022
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# Bk4_Ch4_15.py

import numpy as np
A = np.array([[3, 1], 
              [2, 4]])

# calculate determinant of A
det_A = np.linalg.det(A)