Results 1 to 10 of about 494,087 (171)

B-Fredholm elements in primitive C*-algebras

open access: yesOpen Mathematics, 2022
Let A{\mathcal{A}} be a unital primitive C∗\ast -algebra. This article studies the properties of the B-Fredholm elements, the B-Weyl elements and the B-Browder elements in A{\mathcal{A}}. Particularly, this article describes the B-Fredholm element as the
Kong Yingying, Jiang Lining
doaj   +2 more sources

Provenance and distribution of zinc in terrestrial planets [PDF]

open access: yesScientific Reports
The nucleosynthetic Zn isotope compositions of planetary materials shed light on the sources of Zn and other similarly volatile elements during terrestrial planet formation.
Rayssa Martins   +4 more
doaj   +2 more sources

Transposable elements, contributors in the evolution of organisms (from an arms race to a source of raw materials)

open access: yesHeliyon, 2021
There is a concept proposing that the primitive lineages of prokaryotes, eukaryotes, and viruses emerged from the primordial pool of primitive genetic elements.
Fatemeh Pourrajab   +1 more
doaj   +1 more source

Primitive and decomposable elements in homology of ΩΣℂP∞

open access: yesOpen Mathematics, 2021
For each positive integer nn, we let φn:ΣCP∞→ΣCP∞{\varphi }_{n}:\Sigma {\mathbb{C}}{P}^{\infty }\to \Sigma {\mathbb{C}}{P}^{\infty } be the self-maps of the suspension of the infinite complex projective space, or the localization of this space at a set ...
Lee Dae-Woong
doaj   +1 more source

DETAILED PRIMITIVE-BASED 3D MODELING OF ARCHITECTURAL ELEMENTS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2012
The article describes a pipeline, based on image-data, for the 3D reconstruction of building façades or architectural elements and the successive modeling using geometric primitives. The approach overcome some existing problems in modeling architectural
F. Remondino   +4 more
doaj   +1 more source

Features of the Formation of Biological and Cellulosolytic Activity in Soils of Anthropogenous Transformed Ecosystems

open access: yesDarnios Aplinkos Vystymas, 2021
It was found that among the studied monitoring sites in terms of biological activity, the microbial communities of primitive undeveloped soils on sandstone and ordinary chernozem were the least susceptible to the negative influence of environmental ...
Дмитрий Валерьевич Сыщиков   +2 more
doaj   +1 more source

The existence of $\protect \mathbb{F}_q$-primitive points on curves using freeness

open access: yesComptes Rendus. Mathématique, 2022
Let $\mathcal{C}_Q$ be the cyclic group of order $Q$, $n$ a divisor of $Q$ and $r$ a divisor of $Q/n$. We introduce the set of $(r,n)$-free elements of $\mathcal{C}_Q$ and derive a lower bound for the number of elements $\theta \in \mathbb{F}_q$ for ...
Cohen, Stephen D.   +2 more
doaj   +1 more source

METHOD FOR CONSTRUCTING PRIMITIVE POLYNOMIALS FOR CRYPTOGRAPHIC SUBSYSTEMS OF DEPENDABLE AUTOMATED SYSTEMS

open access: yesМіжнародний науково-технічний журнал "Проблеми керування та інформатики", 2020
The paper proposes a method for constructing primitive polynomials that are used in the design of radio engineering systems, subsystems of cryptographic information protection in reliable automated information processing and control systems at critical ...
Г.М. Гулак
doaj   +1 more source

On consecutive primitive elements in a finite field [PDF]

open access: yes, 2014
For $q$ an odd prime power with $q>169$ we prove that there are always three consecutive primitive elements in the finite field $\mathbb{F}_{q}$. Indeed, there are precisely eleven values of $q \leq 169$ for which this is false.
Cohen, Stephen D.   +2 more
core   +1 more source

Composite Diffraction-Free Beam Formation Based on Iteratively Calculated Primitives

open access: yesMicromachines, 2023
To form a diffraction-free beam with a complex structure, we propose to use a set of primitives calculated iteratively for the ring spatial spectrum. We also optimized the complex transmission function of the diffractive optical elements (DOEs), which ...
Pavel A. Khorin   +2 more
doaj   +1 more source

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