Results 21 to 30 of about 2,717 (82)

The Omega Deformation From String and M-Theory [PDF]

, 2012
We present a string theory construction of Omega-deformed four-dimensional gauge theories with generic values of \epsilon_1 and \epsilon_2. Our solution gives an explicit description of the geometry in the core of Nekrasov and Witten's realization of the
A Hanany, A Hashimoto, A Iqbal, A Iqbal, AA Tseytlin, AA Tseytlin, C-H Chen, D Gaiotto, D Krefl, D Orlando, D Orlando, D Orlando, Domenico Orlando, E Witten, G Festuccia, GW Moore, I Antoniadis, I Antoniadis, J Russo, LF Alday, M Aganagic, M Billó, M Gutperle, M Melvin, N Hama, N Hama, N Nekrasov, N Seiberg, NA Nekrasov, NA Nekrasov, NC Leung, O Aharony, P Polchinski, PS Howe, PS Howe, R Dijkgraaf, R Dijkgraaf, S Hellerman, S Reffert, Simeon Hellerman, Susanne Reffert, T Takayanagi, TJ Hollowood   +42 more
core   +2 more sources

Global phase portraits of quintic reversible uniform isochronous centers

Electronic Journal of Qualitative Theory of Differential Equations
This paper studies the global phase portraits of uniform isochronous quintic centers at the origin with time reversibility such that their nonlinear part is not homogeneous.
Lina Guo, Aiyong Chen
doaj   +1 more source

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

Electronic Journal of Qualitative Theory of Differential Equations, 2014
In this article we obtain the geometric classification of singularities, finite and infinite, for the three subclasses of quadratic differential systems with $m_f=4$ possessing exactly two finite singularities, namely: (i) systems with two double complex
Joan Artés, Jaume Llibre, Alex Rezende, Dana Schlomiuk, Nicolae Vulpe   +4 more
doaj   +1 more source

The Orlik-Solomon model for hypersurface arrangements [PDF]

, 2015
We develop a model for the cohomology of the complement of a hypersurface arrangement inside a smooth projective complex variety. This generalizes the case of normal crossing divisors, discovered by P.
Dupont, Clément
core   +4 more sources

Reverse Khas'minskii condition [PDF]

, 2010
The aim of this paper is to present and discuss some equivalent characterizations of p-parabolicity in terms of existence of special exhaustion functions. In particular, Khas'minskii in [K] proved that if there exists a 2-superharmonic function k defined
A. Grigor’yan, Daniele Valtorta, J. Heinonen, L. Helms, L. Sario, R.Z. Khas’minskii, S. Pigola   +6 more
core   +1 more source

Ancient solutions of the homogenous Ricci flow on flag manifolds

Extracta Mathematicae, 2021
For any flag manifold M=G/K of a compact simple Lie group G we describe non-collapsing ancient invariant solutions of the homogeneous unnormalized Ricci flow.
S. Anastassiou, I. Chrysikos
doaj  

Clusters in middle-phase percolation on hyperbolic plane

, 2011
I consider p-Bernoulli bond percolation on graphs of vertex-transitive tilings of the hyperbolic plane with finite sided faces (or, equivalently, on transitive, nonamenable, planar graphs with one end) and on their duals.
Czajkowski, Jan
core   +1 more source

Maximal multiplicity of the line at infinity in a sextic polynomial differential system

Acta et Commentationes: Ştiinţe Exacte şi ale Naturii
We investigate planar polynomial differential systems of degree six having an invariant straight line at infinity with high algebraic multiplicity in the sense of the Poincaré compactification.
Vadim Repeșco
doaj   +1 more source

The rational homology of spaces of long links

, 2016
We provide a complete understanding of the rational homology of the space of long links of m strands in the euclidean space of dimension d > 3. First, we construct explicitly a cosimplicial chain complex whose totalization is quasi-isomorphic to the ...
Tsopméné, Paul Arnaud Songhafouo
core   +1 more source

Countable Basis for Free Electromagnetic Fields

Annalen der Physik, Volume 538, Issue 5, May 2026.
ABSTRACT Polychromatic electromagnetic fields are expanded as integrals over monochromatic fields, such as plane waves, multipolar fields, or Bessel beams. However, monochromatic fields do not belong to the Hilbert space of free Maxwell fields, since their norms diverge.
Ivan Fernandez‐Corbaton
wiley   +1 more source