36
36

Sep 23, 2013
09/13

by
D. Speer; R. Eichhorn; P. Reimann

texts

######
eye 36

######
favorite 0

######
comment 0

We consider an overdamped Brownian particle, exposed to a two-dimensional, square lattice potential and a rectangular ac-drive. Depending on the driving amplitude, the linear response to a weak dc-force along a lattice symmetry axis consist in a mobility in basically any direction. In particular, motion exactly opposite to the applied dc-force may arise. Upon changing the angle of the dc-force relatively to the square lattice, the particle motion remains predominantly opposite to the dc-force....

Source: http://arxiv.org/abs/0903.2736v1

30
30

Sep 23, 2013
09/13

by
H. W. Diehl; H. Chamati

texts

######
eye 30

######
favorite 0

######
comment 0

The critical dynamics of relaxational stochastic models with nonconserved $n$-component order parameter $\bm{\phi}$ and no coupling to other slow variables ("model A") is investigated in film geometries for the cases of periodic and free boundary conditions. The Hamiltonian $\mathcal{H}$ governing the stationary equilibrium distribution is taken to be O(n) symmetric and to involve, in the case of free boundary conditions, the boundary terms $\int_{\mathfrak{B}_j}\mathring{c}_j...

Source: http://arxiv.org/abs/0810.5244v2

39
39

Sep 23, 2013
09/13

by
Marco Pavone; Stephen L. Smith; Francesco Bullo; Emilio Frazzoli

texts

######
eye 39

######
favorite 0

######
comment 0

In this paper we study a dynamic vehicle routing problem in which there are multiple vehicles and multiple classes of demands. Demands of each class arrive in the environment randomly over time and require a random amount of on-site service that is characteristic of the class. To service a demand, one of the vehicles must travel to the demand location and remain there for the required on-site service time. The quality of service provided to each class is given by the expected delay between the...

Source: http://arxiv.org/abs/0903.2695v1

22
22

Jul 20, 2013
07/13

by
L. Herrera; A. Di Prisco; E. Fuenmayor; O. Troconis

texts

######
eye 22

######
favorite 0

######
comment 0

The Misner and Sharp approach to the study of gravitational collapse is extended to the viscous dissipative case in, both, the streaming out and the diffusion approximations. The dynamical equation is then coupled to causal transport equations for the heat flux, the shear and the bulk viscosity, in the context of Israel--Stewart theory, without excluding the thermodynamics viscous/heat coupling coefficients. The result is compared with previous works where these later coefficients were...

Source: http://arxiv.org/abs/0804.3584v2

36
36

Sep 23, 2013
09/13

by
G. W. Gibbons; H. Lu; C. N. Pope

texts

######
eye 36

######
favorite 0

######
comment 0

It is well known that every compact simple group manifold G admits a bi-invariant Einstein metric, invariant under G_L\times G_R. Less well known is that every compact simple group manifold except SO(3) and SU(2) admits at least one more homogeneous Einstein metric, invariant still under G_L but with some, or all, of the right-acting symmetry broken. (SO(3) and SU(2) are exceptional in admitting only the one, bi-invariant, Einstein metric.) In this paper, we look for Einstein metrics on three...

Source: http://arxiv.org/abs/0903.2493v1

31
31

Sep 23, 2013
09/13

by
Anatoly A. Svidzinsky; Marlan O. Scully

texts

######
eye 31

######
favorite 0

######
comment 0

We present analytical solutions for the evolution of collective states of N atoms. On the one hand is a (timed) Dicke state prepared by absorption of a single photon and exhibiting superradiant decay. This is in strong contrast to evolution of a symmetric Dicke state which is trapped for large atomic clouds. We show that virtual processes yield a small effect on the evolution of the rapidly decaying timed Dicke state. However, they change the long time dynamics from exponential decay into a...

Source: http://arxiv.org/abs/0903.2844v1

71
71

Sep 22, 2013
09/13

by
Sreekumar T. Balan; Ofer Lahav

texts

######
eye 71

######
favorite 0

######
comment 0

Retrieval of orbital parameters of extrasolar planets poses considerable statistical challenges.Due to sparse sampling, measurement errors, parameters degeneracy and modelling limitations, there are no unique values of basic parameters, such as period and eccentricity. Here, we estimate the orbital parameters from radial velocity data in a Bayesian framework by utilizing Markov Chain Monte Carlo (MCMC) simulations with the Metropolis-Hastings algorithm. We follow a methodology recently proposed...

Source: http://arxiv.org/abs/0805.3532v3

38
38

Sep 23, 2013
09/13

by
S. J. George; C. H. Ishwara-Chandra

texts

######
eye 38

######
favorite 0

######
comment 0

We present results of deep 150 MHz observations with the GMRT which show several extended radio sources with a range of morphologies. These sources have then further followed up at higher frequencies (610 and 1400 MHz) with the GMRT. GMRT J0137+4121 was a candidate double--double radio galaxy for which we have also used the VLA-A array at C band to resolve the core. These observations have allowed us to determine that this source is a normal radio galaxy with a core and a one sided jet....

Source: http://arxiv.org/abs/0903.2726v1

14
14

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 14

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 1107 Ministry: Election Commission of India Subject: Amendment in the Notification No. 434/UP-HP/2008 dated 12th June, 2008.

Topic: Extraordinary Gazette of India

383
383

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 383

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 3503 Ministry: Election Commission of India Subject: Specifying the names of recognised National and State Parties, registered-unrecognised parties and the list of free symbols.

Topic: Extraordinary Gazette of India

13
13

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 13

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 3841 Ministry: Ministry of Agriculture and Farmers Welfare Subject: The Farm Machinery Training and Testing Institute (Department of Agriculture and Cooperation), Group ’A’ and Group ’B’ Gazetted Post Recruitment Rules, 2009.

Topic: Extraordinary Gazette of India

23
23

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 23

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 744 Ministry: Ministry of Consumer Affairs, Food and Public Distribution Subject: The Central Government Amends the notification No. S.O. 2716(E), dated 21st November, 2008.

Topic: Extraordinary Gazette of India

20
20

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 20

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 746 Ministry: Ministry of Shipping, Road Transport and Highways Subject: The Central Government has intention to acquire the land for maintenance, management and operation of National Highway No. 45B in Madurai District in Tamil Nadu.

Topic: Extraordinary Gazette of India

15
15

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 15

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 748 Ministry: Ministry of Finance Subject: The Income-Tax (6th Amendment) Rules, 2009.

Topic: Extraordinary Gazette of India

13
13

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 13

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 751 Ministry: Ministry of Finance Subject: The Central Government declares Umrigar Agiary to be the place of public worship at Vadodara in Gujarat.

Topic: Extraordinary Gazette of India

16
16

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 16

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 755 Ministry: Ministry of Finance Subject: Amendments to the notification No. S.O. 732(E) dated 3rd July, 2001.

Topic: Extraordinary Gazette of India

16
16

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 16

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 831 Ministry: Ministry of Power Subject: The Lakshadweep Administration, Electricity Department, Assistant Engineer(Electrical Group-B Post Recruitment Rules, 2009.

Topic: Extraordinary Gazette of India

22
22

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 22

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 952 Ministry: Ministry of Law and Justice Subject: The High Court and Supreme Court Judges (Salaries and Conditions of Service) Amendment Act, 2009.

Topic: Extraordinary Gazette of India

11
11

Oct 12, 2017
10/17

by
Directorate of Printing, Government of India

texts

######
eye 11

######
favorite 0

######
comment 0

The Gazette of India Extraordinary Gazette Published by the Directorate of Printing, Department of Publication, Ministry of Housing and Urban Affairs, Government of India Published in 2009, Issue Number 953 Ministry: Ministry of Law and Justice Subject: The Central Industrial Security Force (Amendment) Act, 2009.

Topic: Extraordinary Gazette of India

45
45

Sep 23, 2013
09/13

by
Sergey Smirnov; Dario Bercioux; Milena Grifoni; Klaus Richter

texts

######
eye 45

######
favorite 0

######
comment 0

Traditionally the charge ratchet effect is considered as a consequence of the extrinsic spatial asymmetry engineered by external asymmetric periodic potentials. Here we demonstrate that electrically and magnetically driven dissipative systems with spin-orbit interactions represent an exception from this standard idea. The charge and spin ratchet currents appear just due to the coexistence of quantum dissipation with the intrinsic spatial asymmetry of the spin-orbit coupling. The extrinsic...

Source: http://arxiv.org/abs/0903.2765v1

31
31

Sep 23, 2013
09/13

by
A. V. Sokolov

texts

######
eye 31

######
favorite 0

######
comment 0

In this paper, we continue to study factorization of supersymmetric (SUSY) transformations in one-dimensional Quantum Mechanics into chains of elementary Darboux transformations with nonsingular coefficients. We define the class of potentials that are invariant under the Darboux - Crum transformations and prove a number of lemmas and theorems substantiating the formulated formerly conjectures on reducibility of differential operators for spectral equivalence transformations. Analysis of the...

Source: http://arxiv.org/abs/0903.2835v1

40
40

Sep 23, 2013
09/13

by
Shirley Ho; Simon Dedeo; David Spergel

texts

######
eye 40

######
favorite 0

######
comment 0

We present a new method for detecting the missing baryons by generating a template for the kinematic Sunyaev-Zel'dovich effect. The template is computed from the product of a reconstructed velocity field with a galaxy field; we find that the combination of a galaxy redshift survey such as SDSS and a CMB survey such as ACT and PLANCK can detect the kSZ, and thus the ionized gas, at significant signal-to-noise. Unlike other techniques that look for hot gas or metals, this approach directly...

Source: http://arxiv.org/abs/0903.2845v1

40
40

Sep 23, 2013
09/13

by
T. Aaltonen; for the CDF Collaboration

texts

######
eye 40

######
favorite 0

######
comment 0

We present a measurement of the $\ttbar$ differential cross section with respect to the $\ttbar$ invariant mass, dSigma/dMttbar, in $\ppbar$ collisions at $\sqrt{s}=1.96$ TeV using an integrated luminosity of $2.7\invfb$ collected by the CDF II experiment. The $\ttbar$ invariant mass spectrum is sensitive to a variety of exotic particles decaying into $\ttbar$ pairs. The result is consistent with the standard model expectation, as modeled by \texttt{PYTHIA} with \texttt{CTEQ5L} parton...

Source: http://arxiv.org/abs/0903.2850v1

59
59

Sep 18, 2013
09/13

by
Franziska Synatschke; Georg Bergner; Holger Gies; Andreas Wipf

texts

######
eye 59

######
favorite 0

######
comment 0

We study supersymmetric quantum mechanics with the functional RG formulated in terms of an exact and manifestly off-shell supersymmetric flow equation for the effective action. We solve the flow equation nonperturbatively in a systematic super-covariant derivative expansion and concentrate on systems with unbroken supersymmetry. Already at next-to-leading order, the energy of the first excited state for convex potentials is accurately determined within a 1% error for a wide range of couplings...

Source: http://arxiv.org/abs/0809.4396v2

45
45

Sep 23, 2013
09/13

by
A. S. Vardanyan; A. A. Kteyan; R. A. Vardanyan

texts

######
eye 45

######
favorite 0

######
comment 0

Within the framework of McLaughlin-Scott perturbation theory the equation-of-motion of the dislocation kink in the pinning potential is linearized, assuming the simultaneous influence of ac and dc forces. Based on the equations derived, the probability of kink depinning was studied. The dependencies of the depinning probability on dc and ac forces are analyzed in details.

Source: http://arxiv.org/abs/0903.2700v1

51
51

Sep 23, 2013
09/13

by
Vincent Beck

texts

######
eye 51

######
favorite 0

######
comment 0

Let $\Ascr,\Bscr$ be exact categories with $\Ascr$ karoubian and $M$ be an exact functor. Under suitable adjonction hypotheses for $M$, we are able to show that the direct factors of the objects of $\Ascr$ of the form $MY$ with $Y \in \Bscr$ make up a Frobenius category which allow us to define an $M$-stable category for $\Ascr$ only by quotienting. In addition, we propose a construction of an $M$-stable category for $\Ascr,\Bscr$ triangulated categories and $M$ a triangulated functor. We...

Source: http://arxiv.org/abs/0903.2868v1

26
26

Sep 23, 2013
09/13

by
S. T. Belinschi; D. Shlyakhtenko

texts

######
eye 26

######
favorite 0

######
comment 0

In this paper we give an analytic interpretation of free convolution of type B, introduced by Biane, Goodman and Nica, and provide a new formula for its computation. This formula allows us to show that free additive convolution of type B is essentially a re-casting of conditionally free convolution. We put in evidence several aspects of this operation, the most significant being its apparition as an 'intertwiner' between derivation and free convolution of type A. We also show connections...

Source: http://arxiv.org/abs/0903.2721v1

35
35

Sep 23, 2013
09/13

by
J. M. Hoff da Silva; Roldao da Rocha

texts

######
eye 35

######
favorite 0

######
comment 0

A fundamental action, representing a mass dimension-transmuting operator between Dirac and ELKO spinor fields, is performed on the Dirac Lagrangian, in order to lead it into the ELKO Lagrangian. Such a dynamical transformation can be seen as a natural extension of the Standard Model that incorporates dark matter fields. The action of the mass dimension-transmuting operator on a Dirac spinor field, that defines and introduces such a mapping, is shown to be a composition of the Dirac operator and...

Source: http://arxiv.org/abs/0903.2815v1

54
54

Oct 23, 2017
10/17

by
Government of Goa

texts

######
eye 54

######
favorite 0

######
comment 0

The Goa Gazette Published by the Government Printing Press Government of Goa Published By Authority Gazette Number: 0809-50 Gazette Date: 2009-03-16 Gazette Series: SI Gazette Type: OG - Ordinary Gazette - Extraordinary Gazette Gazette No: 1 Official Details Link

Topic: Goa Gazette

37
37

Sep 23, 2013
09/13

by
Tomoko Mizuguchi; Takashi Odagaki

texts

######
eye 37

######
favorite 0

######
comment 0

A simple monatomic system in two dimensions with a double-well interaction potential is investigated in a wide range of temperature by molecular dynamics simulation. The system is melted and equilibrated well above the melting temperature, and then it is quenched to a temperature 88% below the melting temperature Tm at several cooling rates to produce an amorphous state. Various thermodynamic quantities are measured as a function of temperature while the system is heated at a constant rate. The...

Source: http://arxiv.org/abs/0903.2728v1

25
25

Sep 23, 2013
09/13

by
Paul Kessenich

texts

######
eye 25

######
favorite 0

######
comment 0

Global existence for a system of nonlinear partial differential equations (PDE) modeling an isotropic incompressible viscoelastic material is proved. The structure of the PDE is derived through constitutive assumptions on the material. Restriction on the size of the initial displacement and velocity for the model is specified independent of the size of the viscosity of the material. The proof of global existence combines use of vector fields, local energy decay estimates, generalized Sobolev...

Source: http://arxiv.org/abs/0903.2824v1

42
42

Sep 23, 2013
09/13

by
Iskren Y. Georgiev; Michael Hilker; Thomas H. Puzia; Paul Goudfrooij; Holger Baumgardt

texts

######
eye 42

######
favorite 0

######
comment 0

(Abridged) Using luminosities and structural parameters of globular clusters (GCs) in the nuclear regions (nGCs) of low-mass dwarf galaxies from HST/ACS imaging we derive the present-day escape velocities (v_esc) of stellar ejecta to reach the cluster tidal radius and compare them with those of Galactic GCs with extended (hot) horizontal branches (EHBs-GCs). For EHB-GCs, we find a correlation between the present-day v_esc and their metallicity as well as (V-I)_0 colour. The similar v_esc,...

Source: http://arxiv.org/abs/0903.2857v1

49
49

Sep 23, 2013
09/13

by
Najib Mahdou; Mohammed Tamekkante; Siamak Yassemi

texts

######
eye 49

######
favorite 0

######
comment 0

We compute the Gorenstein weak dimension of a coherent power series rings over a commutative rings and we show that, in general, $\gwd(R) \leq 1$ does not imply that $R$ is an arithmetical ring.

Source: http://arxiv.org/abs/0903.2779v1

43
43

Sep 21, 2013
09/13

by
A. K. Kwasniewski

texts

######
eye 43

######
favorite 0

######
comment 0

The way to arrive at formula of zeta matrix for any graded posets with the finite set of minimal elements is delivered following the first reference. This is being achieved via adjacency and zeta matrix description of bipartite digraphs chains, the representatives of graded posets. The bipartite digraphs elements of such chains amalgamate to form corresponding cover relation graded poset digraphs with corresponding adjacency matrices being amalgamated throughout natural join as special adequate...

Source: http://arxiv.org/abs/0901.0155v2

36
36

Sep 23, 2013
09/13

by
Andrew V. Knyazev; Klaus Neymeyr

texts

######
eye 36

######
favorite 0

######
comment 0

Preconditioned eigenvalue solvers (eigensolvers) are gaining popularity, but their convergence theory remains sparse and complex. We consider the simplest preconditioned eigensolver--the gradient iterative method with a fixed step size--for symmetric generalized eigenvalue problems, where we use the gradient of the Rayleigh quotient as an optimization direction. A sharp convergence rate bound for this method has been obtained in 2001--2003. It still remains the only known such bound for any of...

Source: http://arxiv.org/abs/0801.3099v3

29
29

Sep 22, 2013
09/13

by
Evgeny Epelbaum; Hermann Krebs; Dean Lee; Ulf-G. Meißner

texts

######
eye 29

######
favorite 0

######
comment 0

We present lattice calculations for the ground state energy of dilute neutron matter at next-to-leading order in chiral effective field theory. This study follows a series of recent papers on low-energy nuclear physics using chiral effective field theory on the lattice. In this work we introduce an improved spin- and isospin-projected leading-order action which allows for a perturbative treatment of corrections at next-to-leading order and smaller estimated errors. Using auxiliary fields and...

Source: http://arxiv.org/abs/0812.3653v2

69
69

Sep 23, 2013
09/13

by
Martin Lorenz

texts

######
eye 69

######
favorite 0

######
comment 0

We develop the theory of rational ideals for arbitrary associative algebras R without assuming the standard finiteness conditions, noetherianness or the Goldie property. The Amitsur-Martindale ring of quotients replaces the classical ring of quotients which underlies the previous definition of rational ideals but is not available in a general setting. Our main result concerns rational actions of an affine algebraic group G on R. Working over an algebraically closed base field, we prove an...

Source: http://arxiv.org/abs/0801.3472v3

39
39

Sep 23, 2013
09/13

by
Catalin D. Spataru; Mark S. Hybertsen; Steven G. Louie; Andrew J. Millis

texts

######
eye 39

######
favorite 0

######
comment 0

The Anderson model for a single impurity coupled to two leads is studied using the $GW$ approximation in the strong electron-electron interaction regime as a function of the alignment of the impurity level relative to the chemical potentials in the leads. We employ a non-equilibrium Green's function technique to calculate the electron self-energy, the spin density and the current as a function of bias across the junction. In addition we develop an expression for the change in the expectation...

Source: http://arxiv.org/abs/0903.2683v1

33
33

Sep 23, 2013
09/13

by
Tadeusz Iwaniec; Leonid V. Kovalev; Jani Onninen

texts

######
eye 33

######
favorite 0

######
comment 0

As long ago as 1962 Nitsche conjectured that a harmonic homeomorphism $h \colon A(r,R) \to A(r_*, R_*)$ between planar annuli exists if and only if $\frac{R_*}{r_*} \ge {1/2} (\frac{R}{r} + \frac{r}{R})$. We prove this conjecture when the domain annulus is not too wide; explicitly, when $\log \frac{R}{r} \le {3/2}$. For general $A(r,R)$ the conjecture is proved under additional assumption that either $h$ or its normal derivative have vanishing average on the inner boundary circle. This is the...

Source: http://arxiv.org/abs/0903.2665v1

3
3.0

Sep 20, 2018
09/18

by
Government of Haryana

texts

######
eye 3

######
favorite 0

######
comment 0

Haryana Gazette Gazette Type: Ordinary Date: 2009-3-16 Gazette Number: 12 Department: PWD (B and R) Notification Number: 933 Subject: The Land of Acquisition Act1894 Section of 6 Source URL

Topic: Haryana Gazette

5
5.0

Sep 20, 2018
09/18

by
Government of Haryana

texts

######
eye 5

######
favorite 0

######
comment 0

Haryana Gazette Gazette Type: Ordinary Date: 2009-3-16 Gazette Number: 13 Department: Revenue and Disaster Management Notification Number: 734-E-1-09-716. Subject: The Result of The Departmental Examiniation of Naib Tehsildars Source URL

Topic: Haryana Gazette

6
6.0

Sep 20, 2018
09/18

by
Government of Haryana

texts

######
eye 6

######
favorite 0

######
comment 0

Haryana Gazette Gazette Type: Ordinary Date: 2009-3-16 Gazette Number: 13 Department: PWD (B and R) Notification Number: RA 02-13. Subject: Land Acquisition Act1894 Section of 17 Sub-section (2) Source URL

Topic: Haryana Gazette

34
34

Sep 23, 2013
09/13

by
K. Sakkos; J. Casulleras; J. Boronat

texts

######
eye 34

######
favorite 0

######
comment 0

High order actions proposed by Chin have been used for the first time in path integral Monte Carlo simulations. Contrarily to the Takahashi-Imada action, which is accurate to fourth order only for the trace, the Chin action is fully fourth order, with the additional advantage that the leading fourth and sixth order error coefficients are finely tunable. By optimizing two free parameters entering in the new action we show that the time step error dependence achieved is best fitted with a sixth...

Source: http://arxiv.org/abs/0903.2763v1

33
33

Sep 23, 2013
09/13

by
Hans-Joachim Baues

texts

######
eye 33

######
favorite 0

######
comment 0

We describe a conjecture on the algebra of higher cohomology operations which leads to the computations of the differentials in the Adams spectral sequence. For this we introduce the notion of an n-th order track category which is suitable to study higher order Toda brackets and the differentials in spectral sequences. We describe various examples of higher order track categories which are topological, in particular the track category of higher cohomology operations. Also differential algebras...

Source: http://arxiv.org/abs/0903.2876v1

28
28

Sep 23, 2013
09/13

by
Laura Anderson

texts

######
eye 28

######
favorite 0

######
comment 0

For any rank $r$ oriented matroid $M$, a construction is given of a "topological representation" of $M$ by an arrangement of homotopy spheres in a simplicial complex which is homotopy equivalent to $S^{r-1}$. The construction is completely explicit and depends only on a choice of maximal flag in $M$. If $M$ is orientable, then all Folkman-Lawrence representations of all orientations of $M$ embed in this representation in a homotopically nice way.

Source: http://arxiv.org/abs/0903.2773v1

36
36

Sep 23, 2013
09/13

by
Malgorzata Krolikowska; Grzegorz Sitarski; Andrzej M. Soltan

texts

######
eye 36

######
favorite 0

######
comment 0

The aim is to show that in case of low probability of asteroid collision with Earth, the appropriate selection and weighing of the data are crucial for the impact investigation, and to analyze the impact possibilities using extensive numerical simulations. By means of the Monte Carlo special method a large number of ``clone'' orbits have been generated. A full range of orbital elements in the 6-dimensional parameter space, e.g. in the entire confidence region allowed by the observational...

Source: http://arxiv.org/abs/0903.2727v1

49
49

Sep 22, 2013
09/13

by
Krzysztof G. Hełminiak

texts

######
eye 49

######
favorite 0

######
comment 0

We study the impact of the atmospheric differential chromatic refraction on the measurements and precision of relative astrometry. Specifically, we address the problem of measuring the separations of close pairs of binary stars with adaptive optics in the J and K bands. We investigate the influence of weather conditions, zenithal distance, star's spectral type and observing wavelength on the astrometric precision and determine the accuracy of these parameters that is necessary to detect...

Source: http://arxiv.org/abs/0805.3369v3

48
48

Sep 23, 2013
09/13

by
Daniel Allcock

texts

######
eye 48

######
favorite 0

######
comment 0

We prove the following: there are infinitely many finite-covolume (resp. cocompact) Coxeter groups acting on hyperbolic space H^n for every n < 20 (resp. n < 7). When n=7 or 8, they may be taken to be nonarithmetic. Furthermore, for 1 < n < 20, with the possible exceptions n=16 and 17, the number of essentially distinct Coxeter groups in H^n with noncompact fundamental domain of volume less than or equal to V grows at least exponentially with respect to V. The same result holds for...

Source: http://arxiv.org/abs/0903.0138v2

34
34

Sep 23, 2013
09/13

by
Victor Beresnevich; Sanju Velani; Robert C. Vaughan

texts

######
eye 34

######
favorite 0

######
comment 0

The inhomogeneous metric theory for the set of simultaneously $\psi$-approximable points lying on a planar curve is developed. Our results naturally incorporate the homogeneous Khintchine-Jarnik type theorems recently established in [Ann. of Math. (2), 166 (2007), pp. 367-426] and [Invent. Math., 166 (2006), pp. 103-124]. The key lies in obtaining essentially the best possible results regarding the distribution of `shifted' rational points near planar curves.

Source: http://arxiv.org/abs/0903.2817v1

69
69

Sep 21, 2013
09/13

by
Nikolay Gromov; Vladimir Kazakov; Pedro Vieira

texts

######
eye 69

######
favorite 0

######
comment 0

We present a set of functional equations defining the anomalous dimensions of arbitrary local single trace operators in planar N=4 SYM theory. It takes the form of a Y-system based on the integrability of the dual superstring sigma-model on the AdS_5xS^5 background. This Y-system passes some very important tests: it incorporates the full asymptotic Bethe ansatz at large length of operator L, including the dressing factor, and it confirms all recently found wrapping corrections. The recently...

Source: http://arxiv.org/abs/0901.3753v3