Results 21 to 30 of about 170,403 (264)

Light strings and strong coupling in F-theory

Journal of High Energy Physics, 2023
We consider 4d N $$ \mathcal{N} $$ = 1 theories arising from F-theory compactifications on elliptically-fibered Calabi-Yau four-folds and investigate the non-perturbative structure of their scalar field space beyond the large volume/large complex ...
Max Wiesner
doaj   +1 more source

Global configurations of singularities for quadratic differential systems with exactly three finite singularities of total multiplicity four

Electronic Journal of Qualitative Theory of Differential Equations, 2015
In this article we obtain the geometric classification of singularities, finite and infinite, for the two subclasses of quadratic differential systems with total finite multiplicity $m_f=4$ possessing exactly three finite singularities, namely: systems ...
Joan Artés, Jaume Llibre, Dana Schlomiuk, Nicolae Vulpe   +3 more
doaj   +1 more source

Del Pezzo Singularities and SUSY Breaking

Advances in High Energy Physics, 2011
An analytic construction of compact Calabi-Yau manifolds with del Pezzo singularities is found. We present complete intersection CY manifolds for all del Pezzo singularities and study the complex deformations of these singularities.
Dmitry Malyshev
doaj   +1 more source

Spectral singularities and Bragg scattering in complex crystals

, 2010
Spectral singularities that spoil the completeness of Bloch-Floquet states may occur in non-Hermitian Hamiltonians with complex periodic potentials. Here an equivalence is established between spectral singularities in complex crystals and secularities ...
L. A. Pastur, M. A. Naimark, S. K. Godunov, S. Longhi, V. E. Lyance   +4 more
core   +1 more source

Singular Points of Complex Algebraic Hypersurfaces [PDF]

Journal of Siberian Federal University. Mathematics & Physics, 2018
Let \(f = \sum a_\alpha y^\alpha \) be a multivariate Laurent polynomial with coefficients \(\alpha = (\alpha_1, \dots, \alpha_k)\) defined on \(\mathbb (\mathbb C\setminus 0)^k\), \(y = (y_1, \dots, y_k)\), and let \(V\) be the algebraic set determined by the equation \(f=0\).
Antipova, Irina A., Mikhalkin, Evgeny N., Tsikh, Avgust K.   +2 more
openaire   +2 more sources

Linking the singularities of cosmological correlators

Journal of High Energy Physics, 2022
Much of the structure of cosmological correlators is controlled by their singularities, which in turn are fixed in terms of flat-space scattering amplitudes.
Daniel Baumann, Wei-Ming Chen, Carlos Duaso Pueyo, Austin Joyce, Hayden Lee, Guilherme L. Pimentel   +5 more
doaj   +1 more source

Singularities of $n$-fold integrals of the Ising class and the theory of elliptic curves

, 2007
We introduce some multiple integrals that are expected to have the same singularities as the singularities of the $ n$-particle contributions $\chi^{(n)}$ to the susceptibility of the square lattice Ising model.
, Bailey D H, Barad G, Baxter R J, Bloch S, Boukraa S, Boukraa S, Boukraa S, Boukraa S, Boukraa S Hassani S Maillard J-M McCoy B M Weil J A Zenine N, Brown F C S, Eden R J, Erdeleyi, Felder G Varchenko A, Fischler S, Fischler S, Fischler S, Goncharov A B, Harris M, Huttner M, Itzykson C, J-M Maillard, Jimbo M, Lario J-C, Lyberg I, Maier R S, Maillard J-M, Manojlovic N Nagy Z, N Zenine, Nickel B, Nickel B, Nickel B, Nickel B, Racinet G, Rammal R, Rhoades R C, S Boukraa, S Hassani, Sorokin V N, Sorokin V N, Terr D, Vasilyev D V, Vasilyev D V, Veselov A P, Zenine N, Zenine N, Zenine N, Zenine N   +47 more
core   +1 more source

Classification of phase singularities for complex scalar waves [PDF]

, 2006
Motivated by the importance and universal character of phase singularities which are clarified recently, we study the local structure of equi-phase loci near the dislocation locus of complex valued planar and spatial waves, from the viewpoint of ...
Adachi, Jiro, Ishikawa, Go-o
core   +2 more sources

Revisiting the Lee-Yang singularities in the four-dimensional Ising model: a tribute to the memory of Ralph Kenna

Condensed Matter Physics
We have studied numerically the Lee-Yang singularities of the four dimensional Ising model at criticality, which is believed to be in the same universality class as the φ44 scalar field theory.
J. J. Ruiz-Lorenzo
doaj   +1 more source

Rational blow-downs and smoothings of surface singularities [PDF]

, 2006
In this paper we give a necessary combinatorial condition for a negative--definite plumbing tree to be suitable for rational blow--down, or to be the graph of a complex surface singularity which admits a rational homology disk smoothing.
Stipsicz, Andras I., Szabo, Zoltan, Wahl, Jonathan   +2 more
core   +7 more sources