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nuheluxulu/matrix Secret

Created April 11, 2019 15:50
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matrix
$ irb
irb(main):001:0> require 'matrix'
=> true
irb(main):002:0> @m = Matrix[[-1, -1], [0, -1]]
=> Matrix[[-1, -1], [0, -1]]
irb(main):003:0> @m.inv
=> Matrix[[(-1/1), (1/1)], [(0/1), (-1/1)]]
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