Results 71 to 80 of about 581 (202)

ζ-Conformally Flat LP-Kenmotsu Manifolds and Ricci–Yamabe Solitons [PDF]

, 2022
Abdul Haseeb, Mohd Bilal, Sudhakar Kumar Chaubey, Abdullah Ali H. Ahmadini   +3 more
openalex   +1 more source

Ecology and Diversity of Urban Drosophila Species Communities as Potential Indicators of Biodiversity Decline

Ecology and Evolution, Volume 16, Issue 1, January 2026.
We investigated urban Drosophila communities in Vienna using ~18,000 specimens collected with citizen scientists, identifying 13 species including two new records for Austria (D. mercatorum and D. virilis). Compared to surveys 30 years ago, species richness has declined by more than 50%, with formerly common species replaced by neobiotic taxa.
Martin Kapun, Sonja Steindl, Maria Ricci, Manuel Löhnertz, Flora Strasser, Rui Qiang Chen, Lorin Timaeus, Nikolaus Szucsich, Elisabeth Haring   +8 more
wiley   +1 more source

The Impact of Quasi-Conformal Curvature Tensor on Warped Product Manifolds

Axioms
This work investigates the effects on the factor manifolds of a singly warped product manifold resulting from the presence of a quasi-conformally flat, quasi-conformally symmetric, or divergence-free quasi-conformal curvature tensor.
Bang-Yen Chen, Sameh Shenawy, Uday Chand De, Alaa Rabie, Nasser Bin Turki   +4 more
doaj   +1 more source

Pseudo-Reimannian manifolds endowed with an almost para f-structure

International Journal of Mathematics and Mathematical Sciences, 1985
Let M˜(U,Ω˜,η˜,ξ,g˜) be a pseudo-Riemannian manifold of signature (n+1,n). One defines on M˜ an almost cosymplectic para f-structure and proves that a manifold M˜ endowed with such a structure is ξ-Ricci flat and is foliated by minimal hypersurfaces ...
Vladislav V. Goldberg, Radu Rosca
doaj   +1 more source

TWO-BODY PROBLEM IN KALUZA-KLEIN MODELS WITH RICCI-FLAT INTERNAL SPACES

Odessa Astronomical Publications, 2013
We consider the dynamics of a two-body system in the model with additional spatial dimensions compactified on a Ricci-flat manifold. To define the gravitational field of a system and to construct its Lagrange function we use the weak-field approach.
Alexey Chopovsky
doaj   +1 more source

Ricci-flat K�hler metrics on affine algebraic manifolds. II

Mathematische Annalen, 1990
[For part I, cf. Proc. 21st Int. Taniguchi Symp., Katata/Japan, Conf., Kyoto/Japan 1987, Lect. Notes Math. 1339, 20-31 (1988; Zbl 0659.53048).] Let X be a compact Fano manifold and D be a smooth reduced divisor in X such that \(c_ 1(X)=\alpha [D]\) with \(\alpha >1\). If D admits an Einstein-Kähler metric, then there exists a complete Ricci-flat Kähler
Kobayashi, Ryoichi, Bando, Shigetoshi
openaire   +1 more source

MicroRNA profiling of testicular Leydig cell tumors identifies a microRNA signature associated with malignancy and miR‐196b‐5p as a potentially useful biomarker

The Journal of Pathology, Volume 268, Issue 1, Page 54-64, January 2026.
Abstract Approximately 10% of testicular Leydig cell tumors (LCTs) are clinically malignant and unresponsive to systemic treatment. Predicting their clinical behavior can be problematic because there are no biomarkers that can consistently discriminate between benign and malignant LCTs.
João Lobo, Nuno Tiago Tavares, Fernanda Fernandes‐Pontes, Vera Constâncio, Ana Teixeira Marques, Bruno Oliveira‐Lopes, Diana Fonseca, Carmen Jerónimo, Rui Henrique, Kvetoslava Michalova, Kristine M Cornejo, Maurizio Colecchia, Costantino Ricci, Muhammad T Idrees, Felix Contreras, Isabel M Fernandez Gonzalez, William J Anderson, Fiona MacLean, Adeboye O Osunkoya, Chia‐Sui Kao, Ankur R Sangoi, Thomas M Ulbright, Andres M Acosta   +22 more
wiley   +1 more source

Embracing new practices in plant breeding for agroecological transition: A diversity‐driven research agenda

PLANTS, PEOPLE, PLANET, Volume 8, Issue 1, Page 38-48, January 2026.
Plant breeding for agroecological transition (AET) holds the potential to transform agriculture by fostering crop diversification and empowering farmers through collaborative, inter‐ and transdisciplinary research. By adopting a systemic, co‐learning approach, we can deepen our understanding of the complex interactions between plant diversity ...
Myriam Adam, Hélène Fréville, Sophia Alami, Hélène Marrou, David Pot, Sébastien Ricci, Mathieu Thomas, Alexandre Guichardaz, Claire Billot, Nathalie Chantret, Brigitte Gouesnard, Sélim Louafi, Emmanuelle Muller, Joël Romaric Nguepjop, Christophe Pradal, Bénédicte Rhoné, Stéphanie Sidibé‐ Bosc, Muriel Tavaud, Kirsten Vom Brocke, Hélène Joly I   +19 more
wiley   +1 more source

100 years of GAMM: Motivation, history and achievements

ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift für Angewandte Mathematik und Mechanik, Volume 106, Issue 1, January 2026.
Abstract The International Association of Applied Mathematics and Mechanics (Gesellschaft für Angewandte Mathematik und Mechanik, GAMM) was founded in 1923 with the goal to strengthen the field of scientific engineering by the foundation of an Engineering Association with strong scientific contacts to Applied Mathematics.
Wolfgang Ehlers
wiley   +1 more source

Beyond the Hodge theorem: Curl and asymmetric pseudodifferential projections

Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.
Abstract We develop a new approach to the study of spectral asymmetry. Working with the operator curl:=∗d$\operatorname{curl}:={*}\mathrm{d}$ on a connected oriented closed Riemannian 3‐manifold, we construct, by means of microlocal analysis, the asymmetry operator — a scalar pseudodifferential operator of order −3$-3$.
Matteo Capoferri, Dmitri Vassiliev
wiley   +1 more source