Results 41 to 50 of about 716,407 (270)

E_{10} Symmetry in One-dimensional Supergravity [PDF]

, 1998
We consider dimensional reduction of the eleven-dimensional supergravity to less than four dimensions. The three-dimensional $E_{8(+8)}/SO(16)$ nonlinear sigma model is derived by direct dimensional reduction from eleven dimensions.
Alvarez, Banks, Baulieu, Breitenlohner, Cremmer, Cremmer, Dick, Dick, Ehlers, Font, Freudenthal, Gebert, Geroch, Giveon, Hull, Julia, Julia, Julia, Julia, Julia, Kac, Marcus, Matzner, Nicolai, Nicolai, Nicolai, Nicolai, Nicolai, Rey, Schwarz, Sen, Shun'ya Mizoguchi   +31 more
core   +2 more sources

Adaptive Symmetry Reduction [PDF]

, 2007
Symmetry reduction is a technique to counter state explosion for systems of regular structure. It relies on idealistic assumptions about indistinguishable components, which in practice may only be similar. In this paper we present a generalized algebraic approach to symmetry reduction for exploring a structure without any prior knowledge about its ...
openaire   +1 more source

Loop Quantum Cosmology I: Kinematics

, 1999
The framework of quantum symmetry reduction is applied to loop quantum gravity with respect to transitively acting symmetry groups. This allows to test loop quantum gravity in a large class of minisuperspaces and to investigate its features - e.g.
Ashtekar A, Ashtekar A, Ashtekar A, Barbero G J F, Bojowald M, Bojowald M, Bojowald M Loop Quantum cosmology III: Wheeler-DeWitt operators, Ellis G F R, Ellis G F R, Kobayashi S, Kobayashi S, Kodama H, Lidsey J E, MacCallum M A H, Martin Bojowald, Polchinski J, Rovelli C, Smolin L, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Torre C G   +22 more
core   +2 more sources

Symmetry reduction for stochastic hybrid systems [PDF]

2008 47th IEEE Conference on Decision and Control, 2008
This paper is focused on adapting symmetry reduction, a technique that is highly successful in traditional model checking, to stochastic hybrid systems. To that end, we first show that performability analysis of stochastic hybrid systems can be reduced to a stochastic reachability analysis (SRA).
Bujorianu, L.M., Katoen, Joost P.
openaire   +2 more sources

Vector Symmetry Reduction

Electronic Notes in Theoretical Computer Science, 2009
AbstractSymmetry reduction is an effective state-space reduction technique for model checking, and works by restricting search to equivalence class representatives with respect to a group of symmetries for a model. A major problem with symmetry reduction techniques is the time taken to compute the representative of a state, which can be prohibitive. In
openaire   +1 more source

Point symmetries of generalized Toda field theories: II. Symmetry reduction [PDF]

Journal of Physics A: Mathematical and General, 2000
Summary: The Lie symmetries of a large class of generalized Toda field theories are studied and used to perform symmetry reduction. Reductions lead to generalized Toda lattices, on one hand, and to periodic systems, on the other. Boundary conditions are introduced to reduce theories on an infinite lattice to those on semi-infinite or finite ones.
Martina, L., Lafortune, S., Winternitz, P.   +2 more
openaire   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Geometry of classical Higgs fields [PDF]

, 2005
In gauge theory, Higgs fields are responsible for spontaneous symmetry breaking. In classical gauge theory on a principal bundle P, a symmetry breaking is defined as the reduction of a structure group of this principal bundle to a subgroup H of exact ...
Sardanashvily, G.
core   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

The O(dd) Story of Massive Supergravity [PDF]

, 1999
The low energy effective action describing the standard Kaluza-Klein reduction of heterotic string theory on a d-torus possesses a manifest O(d,d+16) symmetry. We consider generalized Scherk-Schwarz reductions of the heterotic string to construct massive
Kaloper, Nemanja, Myers, Robert C.
core   +4 more sources