Results 61 to 70 of about 28,343 (263)

Remarks on Sectional Curvature of an Indefinite Metric [PDF]

open access: yesProceedings of the American Mathematical Society, 1983
The properties of sectional curvature for an indefinite metric are further studied following the works of R. S. Kulkarni, L. Graves and the author, S. G. Harris, and M. Dajczer and the author.
openaire   +1 more source

KDM7A and KDM1A inhibition suppresses tumour promoting pathways in prostate cancer

open access: yesMolecular Oncology, EarlyView.
Treatment resistance is a major challenge for patients with advanced prostate cancer. This study examined an alternative approach to target the major prostate cancer‐promoting pathway by targeting epigenetic factors, whose levels are higher in tumours.
Jennie N Jeyapalan   +16 more
wiley   +1 more source

Generalized pseudo Ricci symmetric manifolds with semi-symmetric metric connection

open access: yesKuwait Journal of Science, 2014
In this paper, firstly an example of a manifold with almost constant curvature and nearly quasi constant curvature which is neither quasi Einstein nor nearly quasi Einstein is given.
SEZGIN ALTAY DEMIRBAG
doaj  

A Novel Approach for Evaluating Seismic Performance of Frame-Type Underground Structures

open access: yesBuildings
This paper examines the seismic performance evaluation methodology for underground structures. Through analysis of seismic damage and failure characteristics of underground structures, this study proposes a novel evaluation approach for frame-type ...
Zhong-Yang Yu   +5 more
doaj   +1 more source

On curvature tensors of Norden and metallic pseudo-Riemannian manifolds

open access: yesComplex Manifolds, 2019
We study some properties of curvature tensors of Norden and, more generally, metallic pseudo-Riemannian manifolds. We introduce the notion of J-sectional and J-bisectional curvature of a metallic pseudo-Riemannian manifold (M, J, g) and study their ...
Blaga Adara M., Nannicini Antonella
doaj   +1 more source

Longitudinal circulating tumor DNA profiling in patients with advanced endometrial cancer using an off‐the‐shelf targeted NGS panel

open access: yesMolecular Oncology, EarlyView.
Intratumour heterogeneity complicates precision management of advanced endometrial cancer. Circulating tumor DNA (ctDNA) offers a minimally invasive strategy to capture tumor evolution and therapeutic resistance. Here, we compare tumor‐agnostic NGS with tumor‐informed ddPCR, outlining their relative sensitivity, concordance, and clinical implications ...
Carlos Casas‐Arozamena   +15 more
wiley   +1 more source

Structural properties of the sets of positively curved Riemannian metrics on generalized Wallach spaces

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы
In the present paper sets related to invariant Riemannian metrics of positive sectional and (or) Ricci curvature on generalized Wallach spaces are considered.
N.A. Abiev
doaj   +1 more source

Complete spacelike hypersurfaces with positive r-th mean curvature in a semi-Riemannian warped product

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
In this paper, by supposing a natural comparison inequality on the positive r-th mean curvatures of the hypersurface, we obtain some new Bernstein-type theorems for complete spacelike hypersurfaces immersed in a semi-Riemannian warped product of constant
Wang Yaning, Liu Ximin
doaj   +1 more source

Interaction of HS1BP3 with cortactin modulates TKS5 localisation, cell secretion and cancer malignancy

open access: yesMolecular Oncology, EarlyView.
Here, we demonstrate that HS1BP3 interacts with Cortactin through a proline‐rich region (PRR3.1) and show that this interaction, and HS1BP3 itself, promote cancer cell proliferation and invasion. Inhibition of this interaction leads to build‐up of TKS5 in multivesicular endosomes and altered secretion of CD63 and CD9, providing an explanation for the ...
Arja Arnesen Løchen   +9 more
wiley   +1 more source

Beltrami-Meusnier formulas of generalized semi ruled surfaces in semi Euclidean space

open access: yesKuwait Journal of Science, 2014
In this paper, we study the sectional curvatures of the generalized semi ruled surfaces in semi Euclidean space   The first fundamental form and the metric coefficients of the generalized semi ruled surfaces are calculated and in these regards ...
MAHMUT AKYIG١IT   +2 more
doaj  

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