math

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import math
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import numpy as np
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f = np.array([[10, 20, 30], [40, 50, 60], [7, 8, 9]])
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print(np.linalg.det(f))
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A = np.array([[1, 2], [3, 4], [5, 6]])
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B = np.ones((3,2))
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AT = A.transpose()
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C = np.dot(A, B.transpose())
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print(A)
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print(B)
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print(C)
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print(np.trace(C))
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print(np.linalg.matrix_rank(B))