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## Main Question or Discussion Point

Hi everybody, a teacher of mine has told me that any complex, self adjoint matrix 2*2 which trace is zero can be written as a linear combination of the pauli matrices.

I want to prove that, but I haven't been able to.

Please, could somebody point me a book where it is proven, or tell me how to do it?

Thanks for reading

I want to prove that, but I haven't been able to.

Please, could somebody point me a book where it is proven, or tell me how to do it?

Thanks for reading