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19 Jul 2019: 2=. mM. hm M. p(m M)2 4mM cos2(ka). i. The resulting dispersion relation is sketched in Figure 57 in the first Brillouin zone. ... This is because it is. valid only at long wavelengths, ka 1.

17 Jun 2019: c k cot ka = 0. Find the minimum value of V0 for this equation to have a solution. ... Giventhat. 〈x〉 =1. 2k(ka tan ka),. discuss briefly the possibility of 〈x〉 being greater than a.

22 Aug 2019: Archaeology at Cambridge. 2009–2010. McDonald Institute for Archaeological Research. ContactsMcDonald Institute for Archaeological ResearchDowning Street, Cambridge, CB2 3ER, UKwww.mcdonald.cam.ac.ukReception 44 (0)1223 333538Graeme Barker

22 Aug 2019: Archaeology at Cambridge. 2009–2010. McDonald Institute for Archaeological Research. ContactsMcDonald Institute for Archaeological ResearchDowning Street, Cambridge, CB2 3ER, UKwww.mcdonald.cam.ac.ukReception 44 (0)1223 333538Graeme Barker

30 Aug 2019: Show that a Killing covector ka satisfies. ka;bc = Rabcdkd. A spacetime is said to be static if it possesses a timelike Killing covector ka whichis hypersurface-orthogonal. ... with ρ p > 0 then the fluid 4-velocity ua is parallel to ka. [

17 Jun 2019: Let. Q(k) = aR′ (a)R(a). kaj′ (ka)j(ka). Obtain the relation. tan δ =Q(k)j2(ka)ka. ... Q(k)n(ka)j(ka)ka 1. Suppose thattan δ. γ. k0 k,. for some , with all other δ small for k k0.

6 Nov 2019: or B = 0 , cos(ka) = 0 ,. ψ(x) = A cos(kx) , k =nπ. ... C cos(la) = A exp(ka) , (4.40)lC sin(la) = kA exp(ka).

17 Jun 2019: Let. KA = {X Mnn(R) | [A, X] = 0}LA = {[A, X] | X Mnn(R)}. ... Show that KA and LA are linear subspaces of Mnn(R). If A and B are similar, showthat KA = KB and LA = LB.

17 Jun 2019: If Ka are the components of a contravariant vector field and gab the componentsof a metric tensor, let. ... In a particular co-ordinate system (x1,x2,x3,x4), it is given that Ka = (0, 0, 0, 1),Qab = 0.

18 Oct 2019: non-negative, because. n = nhn|ni = hn|N |ni = hn|A†A|ni = kA|nik2 0 (3.11). ... Taking the norm of both sides shows that. |cn|2 = kA†|nik2 = hn|AA†|ni = hn|N 1|ni = n 1.