N. Srivastava

activity

20082023

most citedCovariance estimation for distributions with

2 + ε

moments

72 citations · 174 across the 24 of their papers we have counts for

collaborators

Showing 2019Show all

2 papers · 1 filter

math.CO2019

High-girth near-Ramanujan graphs with localized eigenvectors

Noga Alon, Shirshendu Ganguly, Nikhil Srivastava

We show that for every prime $d$ and $α \in (0, 1/6)$ , there is an infinite sequence of $(d + 1)$ -regular graphs $G = (V, E)$ with girth at least $2 α lo g_{d} (∣ V ∣) (1 - o_{d} (1))$ , second adjac…

math.FA2019

Gaussian Regularization of the Pseudospectrum and Davies' Conjecture

Jess Banks, Archit Kulkarni, Satyaki Mukherjee +1

A matrix $A \in C^{n \times n}$ is diagonalizable if it has a basis of linearly independent eigenvectors. Since the set of nondiagonalizable matrices has measure zero, every…