Search Results for author: Flavio Chierichetti

Found 10 papers, 2 papers with code

Approximating a RUM from Distributions on k-Slates

1 code implementation22 May 2023 Flavio Chierichetti, Mirko Giacchini, Ravi Kumar, Alessandro Panconesi, Andrew Tomkins

In this work we consider the problem of fitting Random Utility Models (RUMs) to user choices.

Online Facility Location with Multiple Advice

no code implementations NeurIPS 2021 Matteo Almanza, Flavio Chierichetti, Silvio Lattanzi, Alessandro Panconesi, Giuseppe Re

Clustering is a central topic in unsupervised learning and its online formulation has received a lot of attention in recent years.

Clustering

Spectral Robustness for Correlation Clustering Reconstruction in Semi-Adversarial Models

no code implementations10 Aug 2021 Flavio Chierichetti, Alessandro Panconesi, Giuseppe Re, Luca Trevisan

We study the reconstruction version of this problem in which one is seeking to reconstruct a latent clustering that has been corrupted by random noise and adversarial modifications.

Clustering

On Additive Approximate Submodularity

no code implementations6 Oct 2020 Flavio Chierichetti, Anirban Dasgupta, Ravi Kumar

We show that an approximately submodular function defined on a ground set of $n$ elements is $O(n^2)$ pointwise-close to a submodular function.

Mallows Models for Top-k Lists

no code implementations NeurIPS 2018 Flavio Chierichetti, Anirban Dasgupta, Shahrzad Haddadan, Ravi Kumar, Silvio Lattanzi

The classic Mallows model is a widely-used tool to realize distributions on per- mutations.

Learning a Mixture of Two Multinomial Logits

no code implementations ICML 2018 Flavio Chierichetti, Ravi Kumar, Andrew Tomkins

In this model, a user is offered a slate of choices (a subset of a finite universe of $n$ items), and selects exactly one item from the slate, each with probability proportional to its (positive) weight.

Vocal Bursts Valence Prediction

Fair Clustering Through Fairlets

2 code implementations NeurIPS 2017 Flavio Chierichetti, Ravi Kumar, Silvio Lattanzi, Sergei Vassilvitskii

We show that any fair clustering problem can be decomposed into first finding good fairlets, and then using existing machinery for traditional clustering algorithms.

Clustering

Algorithms for $\ell_p$ Low-Rank Approximation

no code implementations ICML 2017 Flavio Chierichetti, Sreenivas Gollapudi, Ravi Kumar, Silvio Lattanzi, Rina Panigrahy, David P. Woodruff

We consider the problem of approximating a given matrix by a low-rank matrix so as to minimize the entrywise $\ell_p$-approximation error, for any $p \geq 1$; the case $p = 2$ is the classical SVD problem.

Reconstructing Patterns of Information Diffusion from Incomplete Observations

no code implementations NeurIPS 2011 Flavio Chierichetti, David Liben-Nowell, Jon M. Kleinberg

There is a tree T that we cannot observe directly (representing the structure along which the information has spread), and certain nodes randomly decide to make their copy of the information public.

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