ScalingStacks

Proof. [054F]

Original official author HTML, exact retained edition. Historical TeX conversion verdicts remain unchanged. Cited-edition alignment and mathematical self-containment are not assessed.

Complete original source context · Original author HTML

Proof.

The estimate is proved by the standard integration by parts. Since the eigenfunctions φk\varphi_{k} satisfy

(5.178) −Δh0​φk=Λk⋅φk-\Delta_{h_{0}}\varphi_{k}=\Lambda_{k}\cdot\varphi_{k}

and ‖φk‖L2​(Y2​n−1)=1\|\varphi_{k}\|_{L^{2}(Y^{2n-1})}=1, we have that

|ξk​(z)|\displaystyle|\xi_{k}(z)| =|∫Y2​n−1ξ⋅φk|=|∫Y2​n−1ξ⋅(−Δh0)K0​φk(Λk)K0|\displaystyle=\Big|\int_{Y^{2n-1}}\xi\cdot\varphi_{k}\Big|=\Big|\int_{Y^{2n-1}}\xi\cdot\frac{(-\Delta_{h_{0}})^{K_{0}}\varphi_{k}}{(\Lambda_{k})^{K_{0}}}\Big|
(5.179) ≤1(Λk)K0​∫Y2​n−1|Δh0K0​ξ|⋅|φk|\displaystyle\leq\frac{1}{(\Lambda_{k})^{K_{0}}}\int_{Y^{2n-1}}|\Delta_{h_{0}}^{K_{0}}\xi|\cdot|\varphi_{k}|
(5.180) ≤C​|ξ|C2​K0​(Y2​n−1)(Λk)K0,\displaystyle\leq\frac{C|\xi|_{C^{2K_{0}}(Y^{2n-1})}}{(\Lambda_{k})^{K_{0}}},

where C>0C>0 depends only on the geometry of Y2​n−1Y^{2n-1}.

∎

Original mathematics by the credited authors. Source-backed reader collection; mathematical self-containment is not assessed.