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and is called the angle of the operator. Just like the eigenvalues which may be ordered as a spectrum from smallest to largest, the theory of antieigenvalues orders the antieigenvalues of an operator A from the smallest to the largest turning angles.
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Gustafson, Karl (1968), "The angle of an operator and positive operator products",
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is the cosine of the maximal turning angle. The maximal turning angle is
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are the vectors most turned by a matrix or operator
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137:{\displaystyle \phi (A)}
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254:-related article is a
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55:The antieigenvectors
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108:{\displaystyle \mu }
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88:{\displaystyle A}
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