Buscador de Tesis y publicaciones académicas

Functional calculi, positivity, and convolution of matrices

Javad Mashreghi · Mostafa Nasri · Prateek Kumar Vishwakarma

Convolution admits a natural formulation as a functional operation on matrices. Motivated by the functional and entrywise calculi, this leads to a framework in which convolution defines a matrix transform that preserves positivity. Within this setting, we establish results parallel to the classical theories of Pólya--S...

Newton weighted-Lê-Yomdin polynomials and μ-Zariski pairs of surface singularities

Christophe Eyral · Masaharu Ishikawa · Mutsuo Oka

We investigate surface singularities defined by weighted-Lê-Yomdin polynomials, with a particular focus on a specific subclass that we refer to as Newton weighted-Lê-Yomdin polynomials. In particular, using polynomials in this subclass, we develop a method to construct new $μ$-Zariski pairs of surface singularities.

Cholesky decomposition for symmetric matrices over finite fields

Prateek Kumar Vishwakarma

Inspired by the seminal work of André-Louis Cholesky -- whose contributions remain crucial in broader sciences even after more than a century -- Cooper, Hanna and Whitlatch (2024) developed a theory of positive matrices over finite fields, and Khare and Vishwakarma (2025) described a general Cholesky factorization for...

The unique protein-binding property and strong byproduct separation capability of salt-tolerant anion exchanger TOYOPEARL NH2-750F

Yifan, Yang · Yifeng, Li

TOYOPEARL NH2-750F is a salt tolerant anion exchange (AEX) resin from Tosoh, which is designed for intermediate purification of mAbs and other types of biomolecules. It is composed of polymethacrylate beads that have been functionalized with primary amine (NH2) AEX groups. Unlike conventional AEX resins, NH2-750F resin...

Categorical-algebraic aspects of Heyting semilattices

X. García-Martínez · J.R.A. Gray · M.A. Hoefnagel · T. Van der Linden · y 1 más

This article gives an overview of some key categorical-algebraic properties of the variety of Heyting semilattices, with the aim of correcting a misconception in the literature. We confirm that the category of Heyting semilattices is not algebraically coherent, even though it satisfies a strong version of the so-called...

SemVul: Semantic-enhanced graph neural networks for code property graph-based vulnerability detection

Affan Younas · Leonardo Regano · Giorgio Giacinto

Vulnerabilities in source code are often the root cause of cyberattacks worldwide, as attackers exploit weaknesses in software to gain unauthorized access, steal data, or disrupt services. In this study, we evaluated existing research approaches and propose SemVul, a vulnerability detection pipeline that demonstrates b...

XANES and EXAFS probing of d-elements nature in High-Entropy Clorides

Yin-Ying TING · Piotr KOWALSKI · Sebastian SCHUMACHER · Elena BAZARKINA · y 2 más

High-entropy materials (HEMs) such as High-Entropy Oxides (HEOs) offer great structural diversity with astonishing potential to fine tune material properties depending on stoichiometry and composition. High-entropy chlorides (HECl’s) offer similar structural diversity to HEOs and share potential applications in solid-s...

Modified gravity framework for the Woods-Saxon inflation: Theoretical foundations and observational constraints

Feyzollah Younesizadeh · Davoud Kamani · Younes Younesizadeh

We investigate an inflationary scenario within a modified gravity theory that extends the Einstein-Hilbert action through a non-minimal coupling between the inflaton $ϕ$ and the trace of the energy-momentum tensor $T$. This $f(ϕ)T$ framework is designed to naturally recover the standard general relativity in the post-i...

Towards a 20 ps timing detector with hybrid and CMOS monolithic LGADs for the future ALICE 3 experiment at LHC

Strazzi, Sofia · Bregant, M. · Bufalino, S. · Buthelezi, Z. · y 32 más

A complex Hadamard matrix of order 94

Ferenc Szöllősi

In this paper we modify a fundamental block construction of Kharaghani and Seberry and show how to use certain circulant $\{-1,1\}$-matrices of odd order $p$ to construct a complex Hadamard matrix of order $2p$. In particular, for $p=47$ we use computer-aided methods to discover the necessary circulant matrices, and co...