Under Construction
								 
							
							
						
	
		
	
		Courses
		
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				Topics in Low Rank Factorization and Data Analysis 
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				Lie Groups and Algebras 
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				Numerical Method for Graphics 
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				Krylov Methods and Applications 
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				Game Theory 
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				Algorithms and Data Structures 
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				Scientific Computing 
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				Programming Languages 
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				Computational Lab 
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				Schemes 
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				Elements of Computational Algebra 
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				Optimization 
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				Groups and Representations 
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				Elements of Algebraic Geometry
				 
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				Code Theory and Cryptography
				 
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				Neural Networks 
			
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		Didactics
		 
		
		
		
		
		
		
		
		
		
		
			Topics in Low Rank Factorization and Data Analysis Course 2024:
			
				-  PCA
					
						- Handwritten notes for PCA Lessons: PDF [ENG] 
- Videos for Lesson 3: Zip [ENG] 
- Video for Lesson 4: Mp4 [ENG] 
- Data PCA Session: Zip [ENG] 
- Codes PCA Session: Zip [ENG] 
 
-  Clustering
					
						- Handwritten notes for Clustering Lessons: PDF [ENG] 
- Data Clustering Session: Zip 
- Codes Clustering Session: Zip [ENG] 
 
-  NMF
					
						- Handwritten notes for NMF Lessons: PDF [ENG] 
- Slides and video for NMF Lesson: ZIP [ENG] 
- Data NMF Session: Zip 
- Codes NMF Session: Zip [ENG] 
 
 
		
			Lie Groups and Algebras Course 2018:
			
		 
		
			Numerical Method for Graphics Course 2018:
			
		 
		
			Krylov Methods and Applications Course 2018:
			
		 
		
		           
			Algorithms and Data Structure Course :
			
		 
		
		  
			Programming Languages Course :
 
			
		 
		  
			Computational Lab : 
			
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					Maximal Bi-clique Extraction Problem: PDF [ENG]
				
 
		
		  
			Elements of Computational Algebra Course 2015:
			
				- Notes of the course, main author Carlo Sircana: Notes [ITA]                
				
-  Jacobi Symbol and its computation: PDF [ENG]  
- Programs used for the computation of Jacobi Symbol: Zip 
 
		  
			Optimization Course :
			
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				Dissertion on Plane Cutting Algorithms: PDF [ITA]
				
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				Programs of Plane Cutting: Zip [ITA]
				
 
		  
			Groups and Representations Course 2016:
			- Notes of the course: PDF [ITA] 
 
		  
			Elements of Algebraic Geometry Course 2016:
			
		 
		  
			Code Theory and Cryptography Course 2016:
			
		 
		  
			Neural Network :
			
				-  Simple C++ Interface for Neural Networks:
				Zip [ENG]
 
	
						
	
	
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				 Interests
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				 Articles
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				 Conferences
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				 Preprints
			
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		Research
		 
		 
		
			My main interests are the spectral analysis and the low-rank factorization of matrices. 
			I have worked on matrix sequences coming from the discretization of linear PDE, 
			on structured matrices used for quantum communications,
			on random matrix polynomial with growing size and/or degree, 
			on spectral properties of matrices with functional entries,
			on perturbation of Hermitian matrices, 
			and on iterative methods in signal processing. 
			Moreover, I have worked in community detection, 
			on clustering problems for directed graphs, 
			and on machine learning techniques aimed to identify symplex structures 
			through the lens of low-rank factorization methods, 
			with a focus on nonnegative matrix factorization.
			More recently, I am interested on symmetric cones coming from Jordan algebras 
			and on indefinite quadratic problems with conic restrictions. 
			
			
			
			Supported by the ERC consolidator grant no 101085607 of the European Union  (Sep 2023 - Jun 2026)
			Project: Beyond Low-Rank Factorizations (eLinoR)
		
		 
		
		
		  
			Preprints and Notes:
			
				
								
				- 
				Barbarino G.,  Gillis N.,
				 Subhayan S.
				
 Identifiability of Nonnegative Tucker Decompositions -- Part I: Theory
 Arxiv (May 2025)
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				Barbarino G.,  Gillis N.,
				 Sossa D.
				
 Computing cone-constrained singular values of matrices
 Arxiv (Apr 2025)
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				Barbarino G., Orlitzky M.
				
 The uniqueness of Lyapunov rank among symmetric cones
 Arxiv (Mar 2025)
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				Barbarino G., 
				Fanizza M., 
				Giovannetti V.,
				Mele F. A.
 Non-asymptotic quantum communication on lossy transmission lines with memory
 Arxiv (Mar 2025)
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				Barbarino G., 
				Weiss S.
 Relations Between Analytic Spectral and Singular Value Decompositions
 submitted to EUSIPCO25 (Mar 2025)
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				Barbarino G., 
				Ekström S.-E.,
				Garoni C.,
				Meadon D.,
				Serra-Capizzano S.,
				Vassalos P.
 From asymptotic distribution and vague convergence to uniform convergence, with numerical applications
 Journal of Numerical Mathematics - to appear (Feb 2025).
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				Barbarino G., 
				Fanizza M., 
				Giovannetti V.,
				Mele F. A.
 Achievable rates in non-asymptotic bosonic quantum communication
 Arxiv (Feb 2025)
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				Barbarino G.,  Gillis N.
				
 On the Robustness of the Successive Projection Algorithm
 Arxiv (Dec 2024)
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				Barbarino G.
				
 Ergodic Estimations for Toeplitz Sequences Generated by a Symbol
 Arxiv (Dec 2024).
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				Barbarino G., 
				Ekström S.-E.,
				Serra-Capizzano S.,
				Vassalos P.
				
 Theoretical results for eigenvalues, singular values, and eigenvectors of (flipped) Toeplitz matrices and related computational proposals
 Arxiv (Jul 2022).
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				Barbarino G.
 Notes on asymptotic eigenvalues distribution on complex circles
 Arxiv (2018)
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				Barbarino G.
 Conjectures on Perturbations of Hermitian Sequences
 Arxiv (2018)
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				Barbarino G.
 Diagonal Matrix Sequences and their Spectral Symbols
 Arxiv (2017)
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				Barbarino G.
 Permutation NMF
 Arxiv (2016)
=======- 
				Barbarino G.
 Permutation NMF
 Arxiv (2016)
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			Articles:
			
				
			
					- 
				Barbarino G., Cavassi R.,
				Cicone A.
				
 Extension and convergence analysis of Iterative Filtering to spherical data
 Linear Algebra and its Applications 721, pp. 542-576  (Sep 2025) -  PDF
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				Barbarino G., 
				
 On the Periodicity of Singular Vectors and the Holomorphic Block-Circulant SVD on the Unit Circumference
 Linear Algebra and its Applications 721, pp. 465-483 (Sep 2025) -  PDF
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				Barbarino G., 
				Ekström S.-E.,
				Garoni C.,
				Meadon D.,
				Serra-Capizzano S.,
				Vassalos P.
 Spectral properties of flipped Toeplitz matrices and computational applications
 Applied Mathematics and Computation 499 (Aug 2025).
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				Barbarino G., 
				Claesson M., 
				Ekström S.-E.,
				Garoni C., 
				Meadon D.,
				Speleers H.
 Matrix-less spectral approximation for large structured matrices
 Bit Numer Math 65, 2 (Mar 2025)
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				Barbarino G., Garoni C.
 GLT sequences and normal matrices
 The Electronic Journal of Linear Algebra  41, pp. 1-20 (Jan 2025)
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				 Abdolali M.,
				Barbarino G.,  Gillis N.
				
 Dual Simplex Volume Maximization for Simplex-Structured Matrix Factorization
 SIAM Journal on Imaging Sciences 17(4), pp. 2362-2391 (Dec 2024) -  PDF
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				Barbarino G., 
				McWhirter J.G.,
				Pestana J.,
				Proudler I.,
				Weiss S.
 On Properties and Structure of the Analytic Singular Value Decomposition
 IEEE Transactions on Signal Processing  72, pp. 2260-2275 (Jan 2024) -  PDF
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				Barbarino G., Cicone A.
				
 Stabilization and Variations to the Adaptive Local Iterative Filtering Algorithm: the Fast Resampled Iterative Filtering Method
 Numerische Mathematik 156, pp. 395-433 (Jan 2024) - 
				 Online  - 
				 PDF
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				Barbarino G., Noferini V.
				
 On the Rellich eigendecomposition of para-Hermitian matrices and the sign characteristics of ∗-palindromic matrix polynomials
 Linear Algebra and its Applications 672, pp. 1-27 (Sep 2023)  - PDF
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				Barbarino G., 
				Garoni C.
				
 An extension of the theory of GLT sequences: sampling on asymptotically uniform grids
 Linear and Multilinear Algebra 71 (12), pp. 2008-2025 (Aug 2023) - PDF
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				Barbarino G., Noferini V.,
				Van Dooren P.
 Role extraction for digraphs via neighborhood pattern similarity
 Physical Review E 106 (5), 054301  (Nov 2022) - PDF
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				Barbarino G., Cicone A.
				
 Conjectures on spectral properties of ALIF algorithm
 Linear Algebra and Its Applications 647, pp. 127–152 (Aug 2022) - PDF
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				Barbarino G., Noferini V.
 The limit empirical spectral distribution of complex matrix polynomials
 Random Matrices: Theory and Applications 11 (3) (Jul 2022) - PDF
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				Barbarino G., Garoni C., 
				Mazza M.,
				Serra-Capizzano S.
 Rectangular GLT sequences
 Electronic Transactions on Numerical Analysis 55, pp. 585-617  (Jun 2022) - PDF
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				Barbarino G., 
				Bianchi D.,
				Garoni C.
				
 Constructive approach to the monotone rearrangement of functions
 Expositiones Mathematicae  40 (1), pp. 155-175 (Mar 2022)  - PDF
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				Barbarino G., Noferini V.
 The limit empirical spectral distribution of Gaussian monic complex matrix polynomials
 Journal of Theoretical Probability  36, pp 99-133 (Feb 2022) - PDF
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				Barbarino G.
 A systematic approach to reduced GLT
 Bit Numer Math 62 (3), pp. 681-743 (Sep 2021) - PDF
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				Barbarino G., Serra-Capizzano S.
 Non‐Hermitian perturbations of Hermitian matrix‐sequences and applications to the spectral analysis of the numerical approximation of partial differential equations
 Numer Linear Algebra Appl. 2020;e2286 (Mar 2020) - PDF
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				Barbarino G., Garoni C., Serra-Capizzano S.
 Block Generalized Locally Toeplitz Sequences: Theory and Applications in the Multidimensional Case
 Electronic transactions on numerical analysis ETNA 53:1, pp. 113-216 (Jan 2020) - PDF
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				Barbarino G., Garoni C., Serra-Capizzano S.
 Block Generalized Locally Toeplitz Sequences: Theory and Applications in the Unidimensional Case
 Electronic transactions on numerical analysis ETNA 53:1, pp. 28-112 (Jan 2020) - PDF
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				Barbarino G.
 Spectral Measures
 Structured Matrices in Numerical Linear Algebra, Springer INdAM Series 30, pp. 1-24 (Apr 2019) -  PDF
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				Barbarino G., Garoni C.
 From convergence in measure to convergence of matrix-sequences through concave functions and
				singular values
 Electr. J. Linear Algebra  32, pp. 500-513 (Feb 2017) - PDF
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				Barbarino G.
 Equivalence between GLT sequences and measurable functions
 Linear Algebra Appl. 529, pp. 397-412 (Sep 2017) - PDF
 
		
		
		
		  
			Conferences, Summer Schools and Presentations
			
 
	
	
	
		
			
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		About
		 
		
		
			Carreer:
		 
			2023 - now : Post-Doctoral Researcher at 
			UMONS in Numerical Analysis
			
			2020 - 2023 : Post-Doctoral Researcher at 
			Aalto University in Numerical Analysis
			
			2016 - 2020 : Ph.D. Degree at SNS in Mathematics
			
			2014 - 2016 : Master Degree at Pisa University and SNS in Applied Mathematics
			
			2011 - 2014 : Bachelor Degree at Pisa University and SNS in Mathematics
		
		
		Funds and Prizes:
		 
			2024 - now : Italian National Scientific Abilitation to the role of Associate Professor
			
			2023 - now : Supported by the ERC consolidator grant no. 101085607
			 Project: Beyond Low-Rank Factorizations (eLinoR)
			
			2023 - 2023 : ILAS LAA Early Career Award, Early Career Speakers for the 25th ILAS Conference
			
			2022 - 2023 : Grant Alfred Kordelinin säätiö, Finland, no. 210122 
			           PI of the Project 
			          Decorrelation Methods for Multi-Input Nonstationary Signals
			2016 - 2020 : Scholarship at SNS - PhD
			
			2011 - 2016 : Scholarship at SNS - Bachelor and Master Degree
		
		
		
		
		 Member of GNCS Indam ( Scientific Computing National Group ) 
		
		 Member of SIAM Activity Group on Linear Algebra (SIAG/LA)
		
		 Member of ILAS International Linear Algebra Society
		 
		 Member of Unione Matematica Italiana (UMI)
		
		
		
Reviewer at ZbMATH ( Zentralblatt MATH ),   
MR ( Mathematical Reviews - MathSciNet ),
 and for  scientific journals 
 
		
		  
			Partial Curriculum Vitae 
		
		
		Researchgate Profile
		
		
		ORCID
		
		
		Google Scholar
		
		
		SCOPUS
		
		
		
	
							
	
	
		
			
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		Other
		 Partecipant and Organizer of Italian Mathematical Olympiad.
		Some useful Links:
		
		Partecipant and Organizer of Italian Mathematical Olympiad.
		Some useful Links:
		
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		Oliforum: official forum of Italian Mathematical Olympiad [ITA]
		
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		Vid: official video-lessons of stages [ITA]
		
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		IMO: International Mathematical Olympiad website [ENG]
		
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		AoPS: Forum, Tutorials, Lessons and much more on Mathematics and Mathematical Olympiad [ENG]
		
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		MateMate: blog on not-so-elementary problems [ITA]
		
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		AndFog: collection of problems and interesting mathematical facts [ITA]
		
		Chess Program for Terminal: Executable 
	
	LA-project (under development):  Website  
	
		Left Chess for Browser (under development):  Website  
		
		Rischiatutto Department Edition, presented by Bargagnati
		
		Other info
in the origin.