Results 61 to 70 of about 2,585,852 (180)

Association of ACE Polymorphism and Diabetic Nephropathy in South Indian Patients [PDF]

open access: yes, 2001
Objective: To study the association of ACE gene polymorphism and diabetic nephropathy in South Indian subjects. Setting: Outpatient clinic of a specialized hospital.
Bala, Karthik   +7 more
core   +1 more source

Inverses of triangular matrices and bipartite graphs [PDF]

open access: yesarXiv, 2013
To a given nonsingular triangular matrix A with entries from a ring, we associate a weighted bipartite graph G(A) and give a combinatorial description of the inverse of A by employing paths in G(A). Under a certain condition, nonsingular triangular matrices A such that A and A^{-1} have the same zero-nonzero pattern are characterized.
arxiv  

Simplicity of Lie algebras of Poisson brackets [PDF]

open access: yesarXiv, 2019
Let $A$ be an associative commutative algebra with $1$ over a field of zero characteristic, $\{,\} : A \times A \to A$ is a Poisson bracket, $Z = \{ a \in A \mid \{a, A\} = (0) \}.$ We prove that if $A$ is simple as a Poisson algebra then the Lie algebra $\frac{\{A,A\}}{\{A,A\}\cap Z}$ is simple.
arxiv  

Spaceflight Alters Bacterial Gene Expression and Virulence and Reveals Role for Global Regulator Hfq [PDF]

open access: yes
A comprehensive analysis of both the molecular genetic and phenotypic responses of any organism to the spaceflight environment has never been accomplished due to significant technological and logistical hurdles.
Bober, R.   +24 more
core   +1 more source

Optimal bounds for a Gaussian Arithmetic-Geometric type mean by quadratic and contraharmonic means [PDF]

open access: yesarXiv, 2018
In this paper, we present the best possible parameters $\alpha_i, \beta_i\ (i=1,2,3)$ and $\alpha_4,\beta_4\in(1/2,1)$ such that the double inequalities \begin{align*} \alpha_1Q(a,b)+(1-\alpha_1)C(a,b)&
arxiv  

Maps between non-commutative spaces [PDF]

open access: yesarXiv, 2002
We examine maps between noncommutative projective spaces. A surjection of graded rings A-->A/J induces a closed immersion Proj(A/J)-->Proj(A). A homomorphism f:A-->B between graded rings induces an affine map U --> Proj(A) from a non-empty open subspace U of Proj(B). If A^{(n)} is the n-th Veronese subalgebra of a graded ring A there is a map Proj(A)-->
arxiv  

A steady smooth Euler flow with support in the vicinity of a helix [PDF]

open access: yesarXiv, 2019
In this article we construct a smooth Euler flow supported in a neighborhood of a helix. It may be considered a generalization of a similar solution found by the author for a circle.
arxiv  

Recognizing dualizing complexes [PDF]

open access: yesarXiv, 2003
Let A be a noetherian local commutative ring and let M be a suitable complex of A-modules. This paper proves that M is a dualizing complex for A if and only if the trivial extension A \ltimes M is a Gorenstein Differential Graded Algebra. As a corollary follows that A has a dualizing complex if and only if it is a quotient of a Gorenstein local ...
arxiv  

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