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Matrix ([[1,2,3],[4,5,6],[7,8,9]])
(Matrix([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])).inv()
(Matrix([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])).eigenvals()
(Matrix([
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]])).eigenvects()
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