Results 11 to 20 of about 10,424,213 (314)

Primitive recursive ordered fields and some applications [PDF]

open access: yesComputer Algebra in Scientific Computing, 2020
We establish primitive recursive (PR) versions of some known facts about computable ordered fields of reals and computable reals, and apply them to prove primitive recursiveness of several important problems in linear algebra and analysis.
V. Selivanov, S. Selivanova
semanticscholar   +1 more source

Ordered fields dense in their real closure and definable convex valuations [PDF]

open access: yesForum mathematicum, 2020
In this paper, we undertake a systematic model- and valuation-theoretic study of the class of ordered fields which are dense in their real closure. We apply this study to determine definable henselian valuations on ordered fields, in the language of ...
L. S. Krapp   +2 more
semanticscholar   +1 more source

Uniformly continuous 1-1 functions on ordered fields not mapping interior to interior [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2008
In an earlier work we showed that for ordered fields F not isomorphic to the reals R, there are continuous 1-1 unctions on [0, 1]F which map some interior point to a boundary point of the image (and so are not open).
Mojtaba Moniri, Jafar S. Eivazloo
doaj   +1 more source

Normal ordering normal modes

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
In a soliton sector of a quantum field theory, it is often convenient to expand the quantum fields in terms of normal modes. Normal mode creation and annihilation operators can be normal ordered, and their normal ordered products have vanishing ...
Jarah Evslin
doaj   +1 more source

Magnetic hydrogels with ordered structure for biomedical applications

open access: yesFrontiers in Chemistry, 2022
Magnetic hydrogels composed of hydrogel matrices and magnetic nanomaterials have attracted widespread interests. Thereinto, magnetic hydrogels with ordered structure possessing enhanced functionalities and unique architectures, show tremendous advantages
Le Xue, Jianfei Sun
doaj   +1 more source

Extragalactic Magnetism with SOFIA (SALSA Legacy Program): The Magnetic Fields in the Multiphase Interstellar Medium of the Antennae Galaxies

open access: yesThe Astrophysical Journal Letters, 2022
Mergers are thought to be a fundamental channel for galaxy growth, perturbing the gas dynamics and the magnetic fields ( B -fields) in the interstellar medium (ISM).
Enrique Lopez-Rodriguez   +10 more
doaj   +1 more source

The fabulous destiny of Richard Dedekind

open access: yesAtti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2021
By using the preliminary results given in a previous divulgative note, we present here a concise and self--contained introduction to the construction of the real field as the unique, up to increasing isomorphism, Dedekind complete totally ordered field ...
Giuseppe Devillanova   +1 more
doaj   +1 more source

The number of $D_4$-fields ordered by conductor

open access: yes, 2021
We consider families of quartic number fields whose normal closures over Q have Galois group isomorphic to D4, the symmetries of a square. To any such field L, one can associate the Artin conductor of the corresponding 2-dimensional irreducible Galois ...
S. A. Altug   +3 more
semanticscholar   +1 more source

Extragalactic Magnetism with SOFIA (SALSA Legacy Program). V. First Results on the Magnetic Field Orientation of Galaxies

open access: yesThe Astrophysical Journal, 2023
We present the analysis of the magnetic field ( B -field) structure of galaxies measured with far-infrared (FIR) and radio (3 and 6 cm) polarimetric observations.
Alejandro S. Borlaff   +15 more
doaj   +1 more source

Polarization of Intrabinary Shock Emission in Spider Pulsars

open access: yesThe Astrophysical Journal, 2023
In so-called spider pulsars, the X-ray band is dominated by intrabinary shock (IBS) synchrotron emission. While the double-peaked X-ray light curves from these shocks have been well characterized in several spider systems (both black widows and redbacks),
Andrew G. Sullivan, Roger W. Romani
doaj   +1 more source

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