Results 131 to 140 of about 46,429 (244)
Presentation of kernels of rational characters of right‐angled Artin groups
Bulletin of the London Mathematical Society, EarlyView.Abstract In this note, we characterise when the kernel of a rational character of a right‐angled Artin group, also known as generalised Bestiva–Brady group, is finitely generated and finitely presented. In these cases, we exhibit a finite generating set and a presentation.
Montserrat Casals‐Ruiz +2 more
wiley +1 more source
Galois subfields of tame division algebras [PDF]
arXiv, 2013 We show that a finite-dimensional tame division algebra D over a Henselian field F has a maximal subfield Galois over F if and only if its residue division algebra has a maximal subfield Galois over the residue field of F. This generalizes the mechanism behind several known noncrossed product constructions to a crossed product criterion for all tame ...
arxiv
Distribution Adaptation and Classification Framework Based on Multiple Kernel Learning for Motor Imagery BCI Illiteracy. [PDF]
Sensors (Basel), 2022 Tao L, Cao T, Wang Q, Liu D, Sun J.
europepmc +1 more source
Computer Applications in Engineering Education, Volume 33, Issue 4, July 2025.ABSTRACT Integer and modular arithmetic is a fundamental area of mathematics, with extensive applications in computer science, and is essential for cryptographic protocols, error correction, and algorithm efficiency. However, students often struggle to understand its abstract nature, especially when transitioning from theoretical knowledge to practical
Violeta Migallón +2 more
wiley +1 more source
Solving a Diophantine problem using different expressions of the difference of two squares
Spreadsheets in Education, 2013 Guided discovery learning can be included in the teaching methods supporting independent and active learning. This paper presents ways how to create and implement guided discovery lessons focused on the investigation of some properties of natural numbers.
Stanislav Lukac +2 more
doaj
Hardwood Species Classification with Hyperspectral Microscopic Images
Journal of Spectroscopy, 2019 We propose a hardwood species identification method based on wood hyperspectral microscopic images. A SOC710VP hyperspectral stereomicroscope was used to acquire microscopic images of a hardwood cross section.
Peng Zhao, Cheng-Kun Wang
doaj +1 more source
General Divisibility Criteria [PDF]
arXiv, 2014 We believe we have made progress in the age-old problem of divisibility rules for integers. Universal divisibility rule is introduced for any divisor in any base number system. The divisibility criterion is written down explicitly as a linear form in the digits of the test number.
arxiv
On Markovianity and classicality in multilevel spin-boson models. [PDF]
Sci Rep, 2023 Chruściński D, Hesabi S, Lonigro D.
europepmc +1 more source
Engineering Reports, Volume 7, Issue 6, June 2025.This article proposes a method for detecting partial discharge faults in substation GIS based on multi frequency signal CEEMDAN fusion processing algorithm. The main innovations are as follows: (1) Data acquisition and signal enhancement aspects. Segmented data collection: By analyzing the state structure of typical GIS partial discharge faults, the ...
Yuan Sun, Hao Xie, Li Chang
wiley +1 more source
Division Rings with Ranks [PDF]
arXiv, 2016 Any superrosy division ring (i.e. a division ring equipped with an abstract notion of rank) is shown to be centrally finite. Furthermore, division rings satisfying a generalized chain condition on definable subgroups are studied. In particular, a division ring of burden n has dimension at most n over its center, and any definable group of definable ...
arxiv