In a paper by schrodinger, he uses [tex]\Delta_p^\frac{1}{2}[/tex], and [tex]\Delta_p^{-\frac{1}{2}}[/tex] in a particular equation:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\Delta_p^\frac{1}{2} \sum_l \frac{\partial}{\partial q_l}\left(\Delta_p^{-\frac{1}{2}}\sum_k a_{lk} \frac{\partial \psi}{\partial q_k}\right)+\frac{8\pi^2}{h^2}(E-V)\psi = 0[/tex]

which he says is "well known from Gibbs' statistical mechanics". Could anyone tell me what particular quantities are, and where I could possibly read more about them (without having to start at the beginning of statistical mechanics)?

Thanks

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# A quantity from schrodinger

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