# Impervious nature of solid matter due to quantum degeneracy pressure

On Wikipedia the following statement is made without reference:

Freeman Dyson showed that the imperviousness of solid matter is due to quantum degeneracy pressure rather than electrostatic repulsion as had been previously assumed.

Can anyone find the appropriate reference(s)?

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Terry took a pop-sci crack at the issue on a earlier question. Also related: physics.stackexchange.com/q/1077/520 . –  dmckee May 17 '12 at 17:24
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## 1 Answer

Wikipedia to the rescue!

FJ Dyson and A Lenard: Stability of Matter, Parts I and II (J. Math. Phys., 8, 423-434 (1967); J. Math. Phys., 9, 698-711 (1968) ); FJ Dyson: Ground-State Energy of a Finite System of Charged Particles (J.Math.Phys. 8, 1538-1545 (1967) )

I found the reference in ref 6 of http://en.wikipedia.org/wiki/Pauli_exclusion_principle

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Thanks John. I should've browsed around a bit more on Wikipedia myself. I think I'll add these references from the Pauli exclusion principle page to the electron degeneracy pressure page. –  Cameron Smith May 17 '12 at 20:52
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