Search Results for author: Abhradeep Guha Thakurta

Found 10 papers, 3 papers with code

Improved Differentially Private and Lazy Online Convex Optimization

no code implementations15 Dec 2023 Naman Agarwal, Satyen Kale, Karan Singh, Abhradeep Guha Thakurta

We study the task of $(\epsilon, \delta)$-differentially private online convex optimization (OCO).

Sample-Efficient Personalization: Modeling User Parameters as Low Rank Plus Sparse Components

no code implementations7 Oct 2022 Soumyabrata Pal, Prateek Varshney, Prateek Jain, Abhradeep Guha Thakurta, Gagan Madan, Gaurav Aggarwal, Pradeep Shenoy, Gaurav Srivastava

We then study the framework in the linear setting, where the problem reduces to that of estimating the sum of a rank-$r$ and a $k$-column sparse matrix using a small number of linear measurements.

Meta-Learning Recommendation Systems

Private Matrix Approximation and Geometry of Unitary Orbits

no code implementations6 Jul 2022 Oren Mangoubi, Yikai Wu, Satyen Kale, Abhradeep Guha Thakurta, Nisheeth K. Vishnoi

Consider the following optimization problem: Given $n \times n$ matrices $A$ and $\Lambda$, maximize $\langle A, U\Lambda U^*\rangle$ where $U$ varies over the unitary group $\mathrm{U}(n)$.

Improved Differential Privacy for SGD via Optimal Private Linear Operators on Adaptive Streams

1 code implementation16 Feb 2022 Sergey Denisov, Brendan Mcmahan, Keith Rush, Adam Smith, Abhradeep Guha Thakurta

Motivated by recent applications requiring differential privacy over adaptive streams, we investigate the question of optimal instantiations of the matrix mechanism in this setting.

Federated Learning

Node-Level Differentially Private Graph Neural Networks

1 code implementation23 Nov 2021 Ameya Daigavane, Gagan Madan, Aditya Sinha, Abhradeep Guha Thakurta, Gaurav Aggarwal, Prateek Jain

Graph Neural Networks (GNNs) are a popular technique for modelling graph-structured data and computing node-level representations via aggregation of information from the neighborhood of each node.

Privacy Preserving

Model-Agnostic Private Learning

no code implementations NeurIPS 2018 Raef Bassily, Abhradeep Guha Thakurta, Om Dipakbhai Thakkar

In the PAC model, we analyze our construction and prove upper bounds on the sample complexity for both the realizable and the non-realizable cases.

General Classification Transfer Learning

Nearly Optimal Private LASSO

no code implementations NeurIPS 2015 Kunal Talwar, Abhradeep Guha Thakurta, Li Zhang

In addition, we show that this error bound is nearly optimal amongst all differentially private algorithms.

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