Results 21 to 30 of about 739,090 (133)

Finite Hyberbolic Planes [PDF]

, 1965
In Bolyai-Lobachevsky Planes with Finite Lines, B. J. Topel Presented seven axioms for a hyperbolic plane and then proved there were no finite hyperbolic planes. This paper begins by reviewing Topel\u27 s article.
Hunsucker, John L.
core   +1 more source

Biologically Younger Individuals, as Identified by MARK‐AGE Biological Age Scores, Display a Distinct Favourable Blood Chemistry Profile Regardless of Age

Aging Cell, Volume 25, Issue 3, March 2026.
Using sets of biomarkers of human ageing, a ‘bioage’ score was established allowing calculation of ‘age difference’ (bioage minus chronological age). Age difference, but not chronological age, was correlated with levels of HDL, Vitamin D, and CD3+ CD4+/CD45+ ratio, with biologically younger subjects displaying favourable values, pointing to a role of ...
María Moreno‐Villanueva, Michael Junk, Grażyna Mosieniak, Ewa Sikora, Miriam Capri, Paolo Garagnani, Chiara Pirazzini, Nicolle Breusing, Jürgen Bernhardt, Christiane Schön, María Blasco, Gerben Zondag, Florence Debacq‐Chainiaux, Beatrix Grubeck‐Loebenstein, Birgit Weinberger, Simone Fiegl, Eugenio Mocchegiani, Marco Malavolta, Robertina Giacconi, Francesco Piacenza, Sebastiano Collino, Efstathios S. Gonos, Daniela Gradinaru, Martijn E. T. Dollé, Eugène Jansen, Michel Salmon, Peter Kristensen, Helen Griffiths, Claude Libert, Valerie Vanhooren, Andreas Simm, Duncan Talbot, Paola Caiafa, Maria Giulia Bacalini, Michele Zampieri, Bertrand Friguet, Isabelle Petropoulos, P. Eline Slagboom, Rudi Westendorp, Antti Hervonnen, Mikko Hurme, Richard Aspinall, Sheila Govind, Daniela Weber, Wolfgang Stuetz, Jan H. J. Hoeijmakers, Iuliia Gavriushina, Oliver R. Sampson, Gastone Castellani, Michael R. Berthold, Tilman Grune, Claudio Franceschi, Alexander Bürkle   +52 more
wiley   +1 more source

DID LOBACHEVSKY HAVE A MODEL OF HIS "IMAGINARY GEOMETRY"? [PDF]

, 2010
The invention of non-Euclidean geometries is often seen through the optics of Hilbertian formal axiomatic method developed later in the 19th century. However such an anachronistic approach fails to provide a sound reading of Lobachevsky's geometrical ...
Rodin, Andrei
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Dimer models and conformal structures

Communications on Pure and Applied Mathematics, Volume 79, Issue 2, Page 340-446, February 2026.
Abstract Dimer models have been the focus of intense research efforts over the last years. Our paper grew out of an effort to develop new methods to study minimizers or the asymptotic height functions of general dimer models and the geometry of their frozen boundaries.
Kari Astala, Erik Duse, István Prause, Xiao Zhong   +3 more
wiley   +1 more source

Curvature‐dimension condition of sub‐Riemannian α$\alpha$‐Grushin half‐spaces

Transactions of the London Mathematical Society, Volume 12, Issue 1, December 2025.
Abstract We provide new examples of sub‐Riemannian manifolds with boundary equipped with a smooth measure that satisfy the RCD(K,N)$\mathsf {RCD}(K, N)$ condition. They are constructed by equipping the half‐plane, the hemisphere and the hyperbolic half‐plane with a two‐dimensional almost‐Riemannian structure and a measure that vanishes on their ...
Samuël Borza, Kenshiro Tashiro
wiley   +1 more source

TTV Species Diversity as a Novel Biomarker of Immune Dysregulation in Aging

Journal of Medical Virology, Volume 97, Issue 11, November 2025.
ABSTRACT Torquetenovirus (TTV) is a prevalent virus whose clinical significance remains unclear, potentially linked to immunosenescence. This study examines TTV species in relation to immune impairment, inflammation, and cellular stress response in aging.
Federica Novazzi, Pietro Giorgio Spezia, Francesca Drago Ferrante, Angelo Paolo Genoni, Paolo Antonio Grossi, Nicasio Mancini, Marco Malavolta, Marta Balietti, Francesco Piacenza, Serena Marcozzi, Carlo Fortunato, Gretta Veronica Badillo Pazmay, Laura Cianfruglia, Alexander Bürkle, María Moreno‐Villanueva, Martijn E. T. Dollé, Eugène Jansen, Tilman Grune, Efstathios S. Gonos, Claudio Franceschi, Miriam Capri, Michele Zampieri, Paola Caiafa, Fabio Ciccarone, Anna Reale, Birgit Weinberger, Ewa Sikora, Florence Debacq‐Chainiaux, Wolfgang Stuetz, Mikko Hurme, P. Eline Slagboom, Jürgen Bernhardt, Fabiola Olivieri, Fabio Filippini, Fabrizio Maggi, Robertina Giacconi   +35 more
wiley   +1 more source

ON THE 3-TRANSITIVITY OF TRANSFORMATION GROUP OF THE LOBACHEVSKY PLANE IN THE BELTRAMI-KLEIN MODEL

, 2020
6-7In this paper the transformation group of the Lobachevsky plane in the Beltrami-Klein model that extends the group of motions is considered.
Нигматуллина Лейсан Ильшатовна
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Asymptotics of quantum 6j$6j$‐symbols and generalized hyperbolic tetrahedra

Journal of Topology, Volume 18, Issue 3, September 2025.
Abstract We establish the geometry behind the quantum 6j$6j$‐symbols under only the admissibility conditions as in the definition of the Turaev–Viro invariants of 3‐manifolds. As a classification, we show that the 6‐tuples in the quantum 6j$6j$‐symbols give in a precise way to the dihedral angles of (1) a spherical tetrahedron, (2) a generalized ...
Giulio Belletti, Tian Yang
wiley   +1 more source

The Combination of Two Small Molecules Improves Neurological Parameters and Extends the Lifespan of C3H Strain Female Mice

Brain and Behavior, Volume 15, Issue 6, June 2025.
The small molecules RepSox and TCP were investigated for their geroprotective effects in aging C3H mice through intraperitoneal administration. Treatment resulted in improved neurological markers and physical parameters in older mice (16‐20 months), while younger treated mice (10‐13 months) showed increased maximum lifespan compared to controls.
Maria Vedunova, Olga Borysova, Elena Mitroshina, Ivan Morgunov, Alexander Fedintsev, Alexey Moskalev   +5 more
wiley   +1 more source

High‐Entropy Halides for Intercalation Battery Electrode Materials

ChemElectroChem, Volume 12, Issue 9, May 5, 2025.
The introduction of the high‐entropy concept to oxides has resulted in improvements in electrochemical properties, which have also been recently applied to fluorides. This concept is a perspective of the fundamentals of high‐entropy concept applying to halides in general.
Sebastian Schumacher, Evgeny V. Alekseev, Shicheng Yu, Hermann Tempel, Rüdiger‐A. Eichel   +4 more
wiley   +1 more source