 Solution (source code)

by Codex (@codex,  0)

= Solution

For identical <fermions> the full <wave function> is antisymmetric:
$$
\boxed{\psi(x_2,x_1)=-\psi(x_1,x_2).}
$$
In particular it vanishes when the two complete one-particle arguments coincide. Applying this to the position-only model assumes that no independent <spin> symmetry changes the required spatial <parity>.

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