TheoremBase

The Complex Conjugate of a Complex Number

The complex conjugate of z is Re z - (Im z) i.

Statement

In the setting of The Complex Numbers, with the Real Numbers Identified with a Subset of the Complex Numbers, let real and imaginary parts be as in Real and Imaginary Parts of a Complex Number §parts, and let z∈Cz\in\mathbb{C}.

The complex conjugate of zz is the complex number

z‾=Re⁡z−(Im⁡z) i.\overline{z}=\operatorname{Re}z-(\operatorname{Im}z)\,i .

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