Results 11 to 20 of about 572 (177)

Embeddings of Ree unitals in a projective plane over a field [PDF]

open access: yesFinite Fields and Their Applications, 2021
We show that the Ree unital $\mathcal{R}(q)$ has an embedding in a projective plane over a field $F$ if and only if $q=3$ and $\mathbb{F}_8$ is a subfield of $F$. In this case, the embedding is unique up to projective linear transformations. Besides elementary calculations, our proof uses the classification of the maximal subgroups of the simple Ree ...
openaire   +4 more sources

Unravelling the origins and P-T-t evolution of the allochthonous Sobrado unit (Órdenes Complex, NW Iberia) using combined U-Pb titanite, monazite and zircon geochronology and REE geochemistry [PDF]

open access: yesSolid Earth, 2020
Abstract. The Sobrado unit, within the upper part of the Órdenes complex (NW Iberia) represents an allochthonous tectonic slice of exhumed high grade metamorphic rocks formed during a complex sequence of orogenic processes in the middle to lower crust.
José Manuel Benítez-Pérez   +5 more
openaire   +8 more sources

Arcs and Ovals in the Hermitian and Ree Unitals

open access: yesEuropean Journal of Combinatorics, 1989
An s-arc in a \(2-(q^ 3+1,q+1,1)\) design is a set of s points meeting no block in more than 2 points. It is called an oval if \(s=q^ 2+1\) and q is odd or if \(s=q^ 2\) and q is even. The 2-transitive examples of such designs are the Hermitian and the Ree unitals (where \(q-3^{2m+1})\). For \(q>2\), the Hermitian unitals are shown not to possess ovals
Edward F. Assmus Jr., Jennifer D. Key
openaire   +2 more sources

Garnet (REE+Y)-bearing mineral association in pegmatite from the Chepino lithotectonic Unit, Western Rhodopes

open access: yesReview of the Bulgarian Geological Society, 2023
Large pegmatite body/bodies are outcropping in the “Suhata Reka” quarry, near the town of Rakitovo. Their bulk mineral composition with dominant K-feldspar (40%), plagioclase (30%), quartz (25%) and mica (≤ 5%) is complemented by (REE+Y)-bearing association of primary and secondary accessories.
Rossitsa D. Vassileva   +5 more
openaire   +1 more source

Bands of Zircon, Allanite and Magnetite in Paleozoic Alkali Granite in the Chungju Unit, South Korea, and Origin of REE Mineralizations [PDF]

open access: yesMinerals, 2019
High-grade Zr–Nb–Y–rare earth element (REE) mineralization occurs as zircon–allanite–magnetite bands in layered Paleozoic alkali rocks which intruded the Gyemyeongsan Formation of the Chungju unit, South Korea. The mineralization period and genesis have been controversial.
Sang-Gun No, Maeng-Eon Park
openaire   +1 more source

Torsion units for a Ree group, Tits group and a Steinberg triality group [PDF]

open access: yesRendiconti del Circolo Matematico di Palermo (1952 -), 2015
The author studies the well-known Zassenhaus conjecture for the integral group rings of the Steinberg simple group of Lie type \(^3D_4(2^3)\), the Ree group of Lie type \(^2F_4(2)\), and its commutator subgroup, the sporadic simple group of Tits, namely, that a torsion normalized unit is conjugate to some group element in the rational group algebra in ...
openaire   +3 more sources

Design of Area and Power Efficient Multiplier Unit using Wallace T ree Algorithm

open access: yesInternational Journal of Recent Technology and Engineering (IJRTE), 2020
In any processing system, the core data path element may be a multiplier that particularly associated with DSP applications, which concludes overall processing unit performance. In such system, the multiplier unit improves the performance will boost up the potential.
R. Krishnaveni*   +4 more
openaire   +1 more source

Evaluating the African arid corridor hypothesis: A meta‐analysis including the phylogenetic and biogeographical history of Sesamothamnus

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky   +6 more
wiley   +1 more source

National Disability Insurance Scheme and Quality of Life Among Carers of Children With Autism Spectrum Disorder in Australia: A Thematic Analysis

open access: yesAustralian Journal of Social Issues, EarlyView.
ABSTRACT Diagnoses of autism spectrum disorder in Australia have increased considerably in recent years. The current study investigated how the National Disability Insurance Scheme (NDIS) impacts quality of life (QoL) among carers of children with autism spectrum disorder.
Jesse Gerhard, Sharon L. Grant
wiley   +1 more source

Rees algebras of unit interval determinantal facet ideals

open access: yesJournal of Pure and Applied Algebra
17 pages.
Ayah Almousa   +2 more
openaire   +3 more sources

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