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We consider a binary unsupervised classification problem where each observation is associated with an unobserved label that we want to retrieve. More precisely, we assume that there are two groups of observation: normal and abnormal. The…

Machine Learning · Statistics 2011-05-05 Stevenn Volant , Marie-Laure Martin Magniette , Stéphane Robin

Classical conformal blocks naturally appear in the large central charge limit of 2D Virasoro conformal blocks. In the $AdS_{3}/CFT_{2}$ correspondence, they are related to classical bulk actions and are used to calculate entanglement…

High Energy Physics - Theory · Physics 2018-05-10 Máté Lencsés , Fábio Novaes

Virasoro conformal blocks are a family of important functions defined as power series via the Virasoro algebra. They are a fundamental input to the conformal bootstrap program for 2D conformal field theory (CFT) and are closely related to…

Probability · Mathematics 2024-01-30 Promit Ghosal , Guillaume Remy , Xin Sun , Yi Sun

Classical Virasoro conformal blocks are believed to be directly related to accessory parameters of Floquet type in the Heun equation and some of its confluent versions. We extend this relation to another class of accessory parameter…

Mathematical Physics · Physics 2021-11-24 O. Lisovyy , A. Naidiuk

We investigate uniform random block lower bidiagonal matrices over the finite field $\mathbb{F}_q$, and prove that their rank undergoes a phase transition. First, we consider block lower bidiagonal matrices with $(k_n+1)\times k_n$ blocks…

Probability · Mathematics 2025-04-17 András Mészáros

Classical invariants for representations of one Lie group can often be related to invariants of some other Lie group. Physics suggests that the right objects to consider for these questions are certain refinements of classical invariants…

Representation Theory · Mathematics 2015-12-01 Swarnava Mukhopadhyay

This paper addresses an R(p,q)-deformed conformal Virasoro algebra with an arbitrary conformal dimension Delta. Wellknown deformations constructed in the literature are deduced as particular cases. Then, the special case of the conformal…

Mathematical Physics · Physics 2019-02-20 Mahouton Norbert Hounkonnou , Fridolin Melong

An isospectral hierarchy of commutative integrable systems associated with a polynomial spectral problem is proposed. The resulting hierarchy possesses a recursion structure controlled by a hereditary operator. The nonisospectral flows…

solv-int · Physics 2009-10-30 Wen-Xiu MA , Zi-Xiang ZHOU

We use the Jack symmetric functions as a basis of the Fock space, and study the action of the Virasoro generators $L_n$. We calculate explicitly the matrix elements of $L_n$ with respect to the Jack-basis. A combinatorial procedure which…

High Energy Physics - Theory · Physics 2009-11-10 Reiho Sakamoto , Jun'ichi Shiraishi , Daniel Arnaudon , Luc Frappat , Eric Ragoucy

This paper proves a matrix model for the Wishart Ensemble with general covariance and general dimension parameter beta. In so doing, we introduce a new and elegant definition of Jack polynomials.

Probability · Mathematics 2015-06-15 Alexander Dubbs , Alan Edelman , Plamen Koev , Praveen Venkataramana

The addition of an A_4 family symmetry and extended Higgs sector to the Standard Model can generate the tribimaximal mixing pattern for leptons, assuming the correct vacuum expectation value alignment of the Higgs scalars. Deviating this…

High Energy Physics - Phenomenology · Physics 2014-11-20 James Barry , Werner Rodejohann

We remind the method to calculate colored Jones polynomials for the plat representations of knot diagrams from the knowledge of modular transformation (monodromies) of Virasoro conformal blocks with insertions of degenerate fields. As an…

High Energy Physics - Theory · Physics 2015-08-18 D. Galakhov , D. Melnikov , A. Mironov , A. Morozov

A VB-algebroid is a vector bundle object in the category of Lie algebroids. We attach to every VB-algebroid a differential graded Lie algebra and we show that it controls deformations of the VB-algebroid structure. Several examples and…

Differential Geometry · Mathematics 2019-12-25 Pier Paolo La Pastina , Luca Vitagliano

For each square complex matrix, V. I. Arnold constructed a normal form with the minimal number of parameters to which a family of all matrices B that are close enough to this matrix can be reduced by similarity transformations that smoothly…

Representation Theory · Mathematics 2010-04-22 Lena Klimenko , Vladimir V. Sergeichuk

We study additive finite-rank perturbations of random periodic band matrices under the assumption that the nontrivial eigenvalues of the perturbation do not depend on the dimension. We establish the eigenvalue/eigenvector BBP transition in…

Probability · Mathematics 2023-04-27 Benson Au

This Letter initiates the study of what we call non-chiral staggered Virasoro modules, indecomposable modules on which two copies of the Virasoro algebra act with the two zero-modes acting non-semisimply. This is motivated by the "puzzle"…

High Energy Physics - Theory · Physics 2015-06-04 David Ridout

A characterization of the structure of a regular matrix pencil obtained by a bounded rank perturbation of another regular matrix pencil has been recently obtained. The result generalizes the solution for the bounded rank perturbation…

Algebraic Geometry · Mathematics 2019-08-08 Itziar Baragaña , Alicia Roca

Generalizing the concept of primary fields, we find a new representation of the Virasoro algebra, which we call it a pseudo-conformal representation. In special cases, this representation reduces to ordinary- or logarithmic-conformal field…

High Energy Physics - Theory · Physics 2015-06-26 A. Aghamohammadi , A. Alimohammadi , M. Khorrami

We revisit the critical two-dimensional Ashkin-Teller model, i.e. the $\mathbb{Z}_2$ orbifold of the compactified free boson CFT at $c=1$. We solve the model on the plane by computing its three-point structure constants and proving crossing…

High Energy Physics - Theory · Physics 2021-11-10 Nikita Nemkov , Sylvain Ribault

In this paper the theory of 2-Variable Boolean Operation (2-VBO) has been discussed on a pair of n-bit strings. 2-VBO serves to bring out the relation between numbers which when plot on a 2-D surface form interesting patterns; patterns that…

Chaotic Dynamics · Physics 2010-08-17 Sudhakar Sahoo , Ipsita Mohanty , Garisha Chowdhary , Arpit Panigrahi