Determinant of a Complex Matrix

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The determinant of a complex matrix A, denoted as det(A), is equal to the complex conjugate of the determinant when the entries of A are conjugated, expressed as det(A*) = (det(A))* where * indicates the complex conjugate. This holds true because the determinant is a polynomial with real coefficients derived from the entries of A. For any polynomial p with real coefficients, substituting the complex conjugates of the variables results in the conjugate of the polynomial's value. The discussion confirms the relationship between the determinant and complex conjugation in matrices. Understanding this property is essential for working with complex matrices in linear algebra.
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Hi,

Is det(A*)=(det(A))*, and why? Here ()* means complex conjugate only, and A is a complex matrix.

Thanks in advance
 
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Yes. The determinant is a polynomial with real coefficients of the entries in A, and for any polynomial p in n variables with real coefficients, p(x_1*, x_2*, ... , x_n*) = p(x_1, x_2, ... , x_n)*.
 
Citan Uzuki said:
Yes. The determinant is a polynomial with real coefficients of the entries in A, and for any polynomial p in n variables with real coefficients, p(x_1*, x_2*, ... , x_n*) = p(x_1, x_2, ... , x_n)*.

Ok I see. Thanks a lot

Regards
 
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