Results 31 to 40 of about 623 (106)

A Re‐Examination of Foundational Elements of Cosmology

Fortschritte der Physik, Volume 74, Issue 3, March 2026.
ABSTRACT This paper undertakes a conceptual re‐examination of several foundational elements of cosmology through the lens of spacetime symmetries. A new derivation of the Friedmann–Lemaître–Robertson–Walker metric is obtained by a careful conceptual examination of rotations and translations on generic manifolds, followed by solving the rotational and ...
Lavinia Heisenberg
wiley   +1 more source

The DNA of Calabi–Yau Hypersurfaces

Fortschritte der Physik, Volume 74, Issue 2, February 2026.
Abstract Genetic Algorithms are implemented for triangulations of four‐dimensional reflexive polytopes, which induce Calabi–Yau threefold hypersurfaces via Batyrev's construction. These algorithms are shown to efficiently optimize physical observables such as axion decay constants or axion–photon couplings in string theory compactifications.
Nate MacFadden, Andreas Schachner, Elijah Sheridan   +2 more
wiley   +1 more source

Screen conformal invariant light-like hypersurfaces of indefinite Sasakian space forms

, 2012
The paper begins with a review of the geometry of indefinite Sasakian manifolds including the structure vector field \(\xi\), the fundamental collineation \(\bar\phi\), the notion of \(\bar \phi\)-sectional curvature and indefinite Sasakian space forms \(\bar M(c)\) of constant \(\bar \phi\)-sectional curvature \(c\).
openaire   +2 more sources

Nonlocality, Superposition, and Time in the 4+1 Formalism. [PDF]

Entropy (Basel), 2023
Strubbe F.
europepmc   +1 more source

Ligand Rigidity Steers the Selectivity and Efficiency of the Photosubstitution Reaction of Strained Ruthenium Polypyridyl Complexes. [PDF]

J Am Chem Soc, 2023
Hakkennes MLA, Meijer MS, Menzel JP, Goetz AC, Van Duijn R, Siegler MA, Buda F, Bonnet S.   +7 more
europepmc   +1 more source

Hypersurfaces with light-like points in a Lorentzian manifold

Hypersurfaces with light-like points in a Lorentzian manifold
identifier:oai:t2r2.star.titech.ac.jp ...
openaire  

3D Information-Theoretic Analysis of the Simplest Hydrogen Abstraction Reaction. [PDF]

J Phys Chem A, 2023
Esquivel RO, Molina-Espíritu M, López-Rosa S.   +2 more
europepmc   +1 more source

Hypersurfaces with light-like points in a Lorentzian manifold II

Hypersurfaces with light-like points in a Lorentzian manifold II
identifier:oai:t2r2.star.titech.ac.jp ...
openaire  

The Wafold: Curvature-Driven Termination and Dimensional Compression in Black Holes. [PDF]

Entropy (Basel)
Viaña J.
europepmc   +1 more source

Heterogeneous-elasticity theory of instantaneous normal modes in liquids. [PDF]

Sci Rep, 2023
Mossa S, Bryk T, Ruocco G, Schirmacher W.   +3 more
europepmc   +1 more source