A random cover of a compact hyperbolic surface has relative spectral gap \(\frac{3}{16}-\varepsilon\). (English) Zbl 1498.58022
Reviewer: Robert Neel (Bethlehem)
Found 8 Documents (Results 1–8)
Ramanujan complexes and golden gates in \(PU(3)\). (English) Zbl 1490.11059
Reviewer: Ivan Matić (Osijek)
On the crystal graph description of the stable Weyl group multiple Dirichlet series. (English) Zbl 1493.11091
Reviewer: Solomon Friedberg (Chestnut Hill)
Ramanujan graphs in cryptography. (English) Zbl 1457.94115
Balakrishnan, Jennifer S. (ed.) et al., Research directions in number theory. Women in numbers IV. Proceedings of the women in numbers, WIN4 workshop. Banff International Research Station, Banff, Alberta, Canada, August 14–18, 2017. Cham: Springer. Assoc. Women Math. Ser. 19, 1-40 (2019).
On the spectral gap for infinite index “congruence” subgroups of SL\(_2(\mathbb{Z})\). (English) Zbl 1028.11031
Reviewer: Jürgen Elstrodt (Münster)
Branching theorems for compact symmetric spaces. (English) Zbl 0990.22010
Reviewer: U.Cattaneo (Maggia)
Natural bounded concentrators. (English) Zbl 0822.05038
Reviewer: P.Horák (Bratislava)
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