proof ch:15-exp-neutron-scattering@proof-4
open in the book ·
parts/12-statistical-mechanics/15-exp-neutron-scattering.tex:578
- attribution positional, not declared (add \derivationof)
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|---|---|---|---|---|
proves |
→ | A crystal with $p$ atoms per primitive cell has exactly $3p$ branches, three of them acoustic | derived | parts/12-statistical-mechanics/15-exp-neutron-scattering.tex:578 |