Search Results for author: Federico Ricci-Tersenghi

Found 16 papers, 2 papers with code

Parallel Learning by Multitasking Neural Networks

no code implementations8 Aug 2023 Elena Agliari, Andrea Alessandrelli, Adriano Barra, Federico Ricci-Tersenghi

A modern challenge of Artificial Intelligence is learning multiple patterns at once (i. e. parallel learning).

Phase transitions in the mini-batch size for sparse and dense two-layer neural networks

no code implementations10 May 2023 Raffaele Marino, Federico Ricci-Tersenghi

This work presents a systematic attempt at understanding the role of the mini-batch size in training two-layer neural networks.

Multi-mode fiber reservoir computing overcomes shallow neural networks classifiers

no code implementations10 Oct 2022 Daniele Ancora, Matteo Negri, Antonio Gianfrate, Dimitris Trypogeorgos, Lorenzo Dominici, Daniele Sanvitto, Federico Ricci-Tersenghi, Luca Leuzzi

In the field of disordered photonics, a common objective is to characterize optically opaque materials for controlling light delivery or performing imaging.

Modern graph neural networks do worse than classical greedy algorithms in solving combinatorial optimization problems like maximum independent set

1 code implementation27 Jun 2022 Maria Chiara Angelini, Federico Ricci-Tersenghi

In this comment, we show that a simple greedy algorithm, running in almost linear time, can find solutions for the MIS problem of much better quality than the GNN.

Combinatorial Optimization

Nonequilibrium Monte Carlo for unfreezing variables in hard combinatorial optimization

no code implementations26 Nov 2021 Masoud Mohseni, Daniel Eppens, Johan Strumpfer, Raffaele Marino, Vasil Denchev, Alan K. Ho, Sergei V. Isakov, Sergio Boixo, Federico Ricci-Tersenghi, Hartmut Neven

In particular, for 90% of random 4-SAT instances we find solutions that are inaccessible for the best specialized deterministic algorithm known as Survey Propagation (SP) with an order of magnitude improvement in the quality of solutions for the hardest 10% instances.

Combinatorial Optimization

Entropic barriers as a reason for hardness in both classical and quantum algorithms

no code implementations30 Jan 2021 Matteo Bellitti, Federico Ricci-Tersenghi, Antonello Scardicchio

We study both classical and quantum algorithms to solve a hard optimization problem, namely 3-XORSAT on 3-regular random graphs.

Disordered Systems and Neural Networks Statistical Mechanics Quantum Physics

Inferring the particle-wise dynamics of amorphous solids from the local structure at the jamming point

no code implementations17 Nov 2019 Rafael Díaz Hernández Rojas, Giorgio Parisi, Federico Ricci-Tersenghi

Jamming is a phenomenon shared by a wide variety of systems, such as granular materials, foams, and glasses in their high density regime.

Statistical Mechanics Disordered Systems and Neural Networks

How to iron out rough landscapes and get optimal performances: Averaged Gradient Descent and its application to tensor PCA

no code implementations29 May 2019 Giulio Biroli, Chiara Cammarota, Federico Ricci-Tersenghi

In many high-dimensional estimation problems the main task consists in minimizing a cost function, which is often strongly non-convex when scanned in the space of parameters to be estimated.

A fast and accurate algorithm for inferring sparse Ising models via parameters activation to maximize the pseudo-likelihood

1 code implementation31 Jan 2019 Silvio Franz, Federico Ricci-Tersenghi, Jacopo Rocchi

We propose a new algorithm to learn the network of the interactions of pairwise Ising models.

Disordered Systems and Neural Networks

SpaRTA - Tracking across occlusions via global partitioning of 3D clouds of points

no code implementations16 Feb 2018 Andrea Cavagna, Stefania Melillo, Leonardo Parisi, Federico Ricci-Tersenghi

Any 3D tracking algorithm has to deal with occlusions: multiple targets get so close to each other that the loss of their identities becomes likely.

Improving variational methods via pairwise linear response identities

no code implementations2 Nov 2016 Jack Raymond, Federico Ricci-Tersenghi

Inference methods are often formulated as variational approximations: these approximations allow easy evaluation of statistics by marginalization or linear response, but these estimates can be inconsistent.

Performance of a community detection algorithm based on semidefinite programming

no code implementations30 Mar 2016 Adel Javanmard, Andrea Montanari, Federico Ricci-Tersenghi

In this paper we study in detail several practical aspects of this new algorithm based on semidefinite programming for the detection of the planted partition.

Community Detection Stochastic Block Model

The backtracking survey propagation algorithm for solving random K-SAT problems

no code implementations20 Aug 2015 Raffaele Marino, Giorgio Parisi, Federico Ricci-Tersenghi

Discrete combinatorial optimization has a central role in many scientific disciplines, however, for hard problems we lack linear time algorithms that would allow us to solve very large instances.

Combinatorial Optimization

On the cavity method for decimated random constraint satisfaction problems and the analysis of belief propagation guided decimation algorithms

no code implementations22 Apr 2009 Federico Ricci-Tersenghi, Guilhem Semerjian

We introduce a version of the cavity method for diluted mean-field spin models that allows the computation of thermodynamic quantities similar to the Franz-Parisi quenched potential in sparse random graph models.

Disordered Systems and Neural Networks Statistical Mechanics Discrete Mathematics

Solving Constraint Satisfaction Problems through Belief Propagation-guided decimation

no code implementations11 Sep 2007 Andrea Montanari, Federico Ricci-Tersenghi, Guilhem Semerjian

Message passing algorithms have proved surprisingly successful in solving hard constraint satisfaction problems on sparse random graphs.

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