释义 |
Characteristic EquationThe equation which is solved to find a Matrix's Eigenvalues, also called theCharacteristic Polynomial. Given a system of equations with Matrix
 | (1) |
the Matrix Equation is
 | (2) |
which can be rewritten
 | (3) |
M can have no Matrix Inverse, since otherwise
 | (4) |
which contradicts our ability to pick arbitrary and . Therefore, M has no inverse, so its Determinantis 0. This gives the characteristic equation
 | (5) |
where denotes the Determinant of A. For a general Matrix
 | (6) |
the characteristic equation is
 | (7) |
See also Ballieu's Theorem, Cayley-Hamilton Theorem, Parodi's Theorem, Routh-Hurwitz Theorem References
Gradshteyn, I. S. and Ryzhik, I. M. Tables of Integrals, Series, and Products, 5th ed. San Diego, CA: Academic Press, pp. 1117-1119, 1979.
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