Results 21 to 30 of about 72,552 (260)

A counterexample to the Nelson-Seiberg theorem

open access: yesJournal of High Energy Physics, 2020
We present a counterexample to the Nelson-Seiberg theorem and its extensions. The model has 4 chiral fields, including one R-charge 2 field and no R-charge 0 filed.
Zheng Sun, Zipeng Tan, Lu Yang
doaj   +1 more source

Multivariable dimension polynomials and new invariants of differential field extensions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2001
We introduce a special type of reduction in the ring of differential polynomials and develop the appropriate technique of characteristic sets that allows to generalize the classical Kolchin's theorem on differential dimension polynomial and find new ...
Alexander B. Levin
doaj   +1 more source

A CLASSIFICATION OF EXTENSIONS GENERATED BY A ROOT OF AN EISENSTEIN-DUMAS POLYNOMIAL [PDF]

open access: yesJournal of Algebraic Systems
It is known that for a discrete valuation v of a field K with value group Z, an valued extension field (K′, v′) of (K, v) is generated by a root of an Eisenstein polynomial with respect to v having coefficients in K if and only if the extension (K′, v′)/(
َAzadeh Nikseresht
doaj   +1 more source

Topological entropy for locally linearly compact vector spaces and field extensions

open access: yesTopological Algebra and its Applications, 2020
Let 𝕂 be a discrete field and (V, ϕ) a pair consisting of a locally linearly compact 𝕂-space V and a continuous endomorphism ϕ: V → V. We provide the formulae to compute the topological entropy ent* of the flow (V, ϕ) subject to either extension or ...
Castellano Ilaria
doaj   +1 more source

PROJECTIVE EXTENSIONS OF FIELDS

open access: yesJournal of the London Mathematical Society, 2006
A field K admits proper projective extensions, i.e. Galois extensions where the Galois group is a nontrivial projective group, unless K is separably closed or K is a pythagorean formally real field without cyclic extensions of odd degree. As a consequence, it turns out that almost all absolute Galois groups decompose as proper semidirect products.
openaire   +2 more sources

The product of a quartic and a sextic number cannot be octic

open access: yesOpen Mathematics
In this article, we prove that the product of two algebraic numbers of degrees 4 and 6 over Q{\mathbb{Q}} cannot be of degree 8. This completes the classification of so-called product-feasible triplets (a,b,c)∈N3\left(a,b,c)\in {{\mathbb{N}}}^{3} with a ...
Dubickas Artūras, Maciulevičius Lukas
doaj   +1 more source

Infinite Towers of Galois Defect Extensions of Kaplansky Fields

open access: yesAnnales Mathematicae Silesianae, 2018
We give conditions for Kaplansky fields to admit infinite towers of Galois defect extensions of prime degree. As proofs of the presented facts are constructive, this provides examples of constructions of infinite towers of Galois defect extensions of ...
Blaszczok Anna
doaj   +1 more source

Are Fertility Preservation Procedures Before Gonadotoxic Therapy and Hematopoietic Stem Cell Transplantation Feasible and Safe in Very Young Children? A Retrospective Cohort Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Fertility preservation (FP) is increasingly integrated into the care of pediatric patients exposed to gonadotoxic therapy or conditioning for hematopoietic stem cell transplantation (HSCT), yet perioperative data in infants and toddlers remain scarce.
Kerstin Saalabian   +13 more
wiley   +1 more source

Dimension-8 SMEFT analysis of minimal scalar field extensions of the Standard Model

open access: yesJournal of High Energy Physics, 2023
We analyze the constraints obtainable from present data using the Standard Model Effective Field Theory (SMEFT) on extensions of the Standard Model with additional electroweak singlet or triplet scalar fields.
John Ellis   +2 more
doaj   +1 more source

I will see it done: Metonymic extensions of the verb see in English

open access: yesCrossroads, 2021
English verbs of perception appear to be significant generators of divergent polysemous senses. The aim of this paper is to propose a dictionary study of the verb see.
Łukasz Matus
doaj   +1 more source

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