Hi all.(adsbygoogle = window.adsbygoogle || []).push({});

This isn't a homework question, but something I thought about. When looking at a system of 2 fermions, we have that:

[tex]

\Psi(r_1,r_2)=-\Psi(r_2,r_1).

[/tex]

Now if we look at a 3 fermion system, then what is the demand for the waveequation? Does it have to be anti-symmetric when switching two of the particles or all three? And if it is all three, then in what order? I.e.:

[tex]

\Psi(r_1,r_2,r_3)=-\Psi(r_2,r_1,r_3) \qquad \text{or}\qquad \Psi(r_1,r_2,r_3)=-\Psi(r_3,r_1,r_3).

[/tex]

I hope you can shed some light on this. Thanks.

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# Fermions and parity

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