Results 291 to 300 of about 174,368 (349)
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A REE-in-plagioclase–clinopyroxene thermometer for crustal rocks
Contributions To Mineralogy and Petrology, 2017Chenguang Sun
exaly +2 more sources
Chemical Geology, 2019
The clay minerals, kaolinite and halloysite are dominant hosts for rare earth elements (REEs) in the weathered crust elution-deposited REE deposits. However, the accumulation of REEs on kaolinite and halloysite has not been systematically compared.
Meijun Yang +5 more
semanticscholar +1 more source
The clay minerals, kaolinite and halloysite are dominant hosts for rare earth elements (REEs) in the weathered crust elution-deposited REE deposits. However, the accumulation of REEs on kaolinite and halloysite has not been systematically compared.
Meijun Yang +5 more
semanticscholar +1 more source
Insight into zircon REE oxy-barometers: A lattice strain model perspective
Earth and Planetary Science Letters, 2019Zircon rare earth element (REE) oxy-barometers have been widely used to calculate magma oxygen fugacity. However, sometimes confusing results are obtained, such as extremely reduced oxygen fugacity in Hadean magmas (e.g.
Xinyu Zou +6 more
semanticscholar +1 more source
Journal of the London Mathematical Society, 2002
Summary: Let \(B = k[x_1, \ldots, x_n]\) be a polynomial ring over a field \(k\) , and let \(A\) be a quotient ring of \(B\) by a homogeneous ideal \(J\) . Let \(\mathfrak{m}\) denote the maximal graded ideal of \(A\) . Then the Rees algebra \(R = A[{\mathfrak{m}} t]\) also has a presentation as a quotient ring of the polynomial ring \(k[x_1, \ldots ...
Herzog, Jürgen +2 more
openaire +2 more sources
Summary: Let \(B = k[x_1, \ldots, x_n]\) be a polynomial ring over a field \(k\) , and let \(A\) be a quotient ring of \(B\) by a homogeneous ideal \(J\) . Let \(\mathfrak{m}\) denote the maximal graded ideal of \(A\) . Then the Rees algebra \(R = A[{\mathfrak{m}} t]\) also has a presentation as a quotient ring of the polynomial ring \(k[x_1, \ldots ...
Herzog, Jürgen +2 more
openaire +2 more sources
Algebra and Logic, 1985
On the basis of a description of the maximal subgroups of finite Ree groups \({}^ 2G_ 2(3^ n)\) the authors prove that for every infinite family K of finite Ree groups the free group with two generators is residually a K-group.
Levchuk, V. M., Nuzhin, Ya. N.
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On the basis of a description of the maximal subgroups of finite Ree groups \({}^ 2G_ 2(3^ n)\) the authors prove that for every infinite family K of finite Ree groups the free group with two generators is residually a K-group.
Levchuk, V. M., Nuzhin, Ya. N.
openaire +2 more sources
, 2020
Rare earth elements (REEs), a group of 17 elements comprises 15 lanthanides, scandium and yttrium, are largely attracting the world’s attention due to their importance in a wide variety of advanced technological applications.
N. Batapola +8 more
semanticscholar +1 more source
Rare earth elements (REEs), a group of 17 elements comprises 15 lanthanides, scandium and yttrium, are largely attracting the world’s attention due to their importance in a wide variety of advanced technological applications.
N. Batapola +8 more
semanticscholar +1 more source
Designs, Codes and Cryptography, 2007
Let \({\mathcal R}_k\) denote the Ree unital of order \(3^k\) for any odd integer \(k\geq 1\), and let \(G_k\) denote the associated Ree group naturally acting on this unital. In [\textit{H. Lüneburg}, J. Algebra 3, 256--259 (1966; Zbl 0135.39401)], it was shown that one cannot embed \({\mathcal R}_k\) in a finite projective plane \(\pi\) of order \(3^{
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Let \({\mathcal R}_k\) denote the Ree unital of order \(3^k\) for any odd integer \(k\geq 1\), and let \(G_k\) denote the associated Ree group naturally acting on this unital. In [\textit{H. Lüneburg}, J. Algebra 3, 256--259 (1966; Zbl 0135.39401)], it was shown that one cannot embed \({\mathcal R}_k\) in a finite projective plane \(\pi\) of order \(3^{
openaire +3 more sources
Proceedings of the London Mathematical Society, 2003
Summary: We study Rees algebras of modules within a fairly general framework. We introduce an approach through the notion of Bourbaki ideals that allows the use of deformation theory. One can talk about the (essentially unique) generic Bourbaki ideal \(I(E)\) of a module \(E\) which, in many situations, allows one to reduce the nature of the Rees ...
Simis, Aron +2 more
openaire +1 more source
Summary: We study Rees algebras of modules within a fairly general framework. We introduce an approach through the notion of Bourbaki ideals that allows the use of deformation theory. One can talk about the (essentially unique) generic Bourbaki ideal \(I(E)\) of a module \(E\) which, in many situations, allows one to reduce the nature of the Rees ...
Simis, Aron +2 more
openaire +1 more source
Environmental Pollution, 2019
Rare earth element (REE) concentrations and patterns were measured in surface water, suspended particles (SP) and oysters from the Pearl River Estuary, China.
Lan Ma +4 more
semanticscholar +1 more source
Rare earth element (REE) concentrations and patterns were measured in surface water, suspended particles (SP) and oysters from the Pearl River Estuary, China.
Lan Ma +4 more
semanticscholar +1 more source