1. Arendt, W., Nittka, R., Peter, W., Steiner, F.: Weyl’s Law: Spectral Properties of the Laplacian in Mathematics and Physic, Mathematical Analysis of Evolution, Information, and Complexity. Wiley, Weinheim (2009)
2. Bérard, P.: On the wave equation on a compact Rimeannina manifold without conjugate points. Math. Z. 155, 249–276 (1977)
3. Bonthonneau, Y.: A lower bound for the
$$\Theta $$
Θ
function on manifolds without conjugate points. Doc. Math. 22, 1275–1283 (2017)
4. Bourgain, J., Watt, N.: Mean square of zeta function, circle problem and divisor problem revisited.
ArXiv:1709.04340
5. Colin de Verdière, Y.: Nombre de points entiers dans une famille homothétique de domains de
$${\mathbb{R}}^n$$
R
n
. Ann. Sci. Ecole Norm. Sup. 10, 559–575 (1977)