| 11. | Retardation effects have been neglected in obtaining the plasma-wave dispersion relation.
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| 12. | He failed, however, to recognize the material dependence of the dispersion relation.
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| 13. | For correlation and the dispersion relations are isotropic.
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| 14. | In case of other forms of the dispersion relation, we have dispersive waves.
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| 15. | The dispersion relation of the linearized BBM equation is
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| 16. | Elements of vector calculus : divergence and cut-off frequencies; dispersion relations.
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| 17. | In the case of the quadratic dispersion relations given above, they are given by:
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| 18. | In this case the dispersion relation is linear, as in section 1.2.
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| 19. | The screened potential determines the inter atomic force and the phonon dispersion relation in metals.
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| 20. | These conditions also give the dispersion relation:
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