2 papers
math.NT2017
A note on Linnik's Theorem on quadratic non-residues
Paul Balister, Béla Bollobás, Jonathan D. Lee +2
We present a short, self-contained, and purely combinatorial proof of Linnik's theorem: for any there exists a constant such that for any , the…
math.CO2016
Eigenvalues of subgraphs of the cube
Béla Bollobás, Jonathan Lee, Shoham Letzter
We consider the problem of maximising the largest eigenvalue of subgraphs of the hypercube of a given order. We believe that in most cases, Hamming balls are maximisers, and…