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5239 research data, page 1 of 524

Increasing and decreasing subsequences and their variants

Stanley, Richard P. (2006)
Publisher: Instituto de Ciencias Matemáticas (ICMAT)
We survey the theory of increasing and decreasing subsequences of permutations. Enumeration problems in this area are closely related to the RSK algorithm. The asymptotic behavior of the expected value of the length is(w) of the longest increasing subsequence of a permutation w of 1, 2,...,n was obtained by Vershik–Kerov and (almost) by Logan–Shepp. The entire limiting distribution of is(w) was then determined by Baik, Deift, and Johansson. These techniques can be applied to other class...

La recherche à l'Ecole Polytechnique

Ecole Polytechnique Palaiseau (2008)
Publisher: CERN
Présentation de l'Ecole Polytechnique Palaiseau. Etudes et recherche.

TTLEM - TopoToolbox Landscape Evolution: Synthetic model run

Campforts, Benjamin (2016)
Publisher: Copernicus Publications
Synthetic landscape evolution simulated with TTLEM software. Model parameters are documented in the attached file.

The Many Ways of the Characteristic Cauchy Problem

Chrusciel, Piotr (2014)
Publisher: Institut des Hautes Études Scientifiques (IHÉS)

Camera trap video of jackals and hyenas eating plains zebra that died of anthrax while foal watches

Steven Bellan; Wayne Getz (2017)
Publisher: Figshare
Motion-sensor camera traps (Reconyx) were used to capture the consumption and decomposition of zebra carcasses during anthrax outbreaks in 2009-2011 in Etosha National Park, Namibia. (Bellan et al. 2013, Methods Ecol Evol, see link below). This video shows a plains zebra (Equus quagga) that died of anthrax (causal bacterial agent Bacillus anthracis) being consumed by black-backed jackals (Canis mesomelas) and spotted hyena (Crocuta crocuta). Jackals live in territorial family groups but aggre...

The undecidability of the domino problem

Jeandel, Emmanuel (2017)
Publisher: CIRM
Embargo end date: 2017/11/28
One of the most fundamental problem in tiling theory is to decide, given a surface, a set of tiles and a tiling rule, whether there exist a way to tile the surface using the set of tiles and following the rules. As proven by Berger in the 60’s, this problem is undecidable in general. When formulated in terms of tilings of the discrete plane by unit tiles with colored constraints, this is called the Domino Problem and was introduced by Wang in an effort to solve satisfaction problems ...

ATLAS TRT barrel

CERN Video Productions (2008)
Publisher: CERN
On 3 February 2005, members of the US-TRT team proceeded to the installation of the last TRT barrel module for the Transition Radiation Tracker, which will be used for tracking in the Atlas detector. The TRT barrel is made of 96 modules containing around 52 000 4-mm straws, each of them equipped with a 20 microns sense wire. The modules were first designed at CERN, then built in the USA between 1996 and 2003. Duke, Hampton and Indiana Universities, tested in details at CERN between 2003 and...

Peierls substitution for magnetic Bloch bands

Teufel, Stefan (2014)
Publisher: CIRM
Embargo end date: 2014/06/30
We consider the one-particle Schrödinger operator in two dimensions with a periodic potential and a strong constant magnetic field perturbed by slowly varying non-periodic scalar and vector potentials, $\phi(\varepsilon x)$ and $A(\varepsilon x)$ , for $\epsilon\ll 1$ . For each isolated family of magnetic Bloch bands we derive an effective Hamiltonian that is unitarily equivalent to the restriction of the Schrödinger operator to a corresponding almost invariant subspace. At leading order, ...

Integral p-adic Hodge theory

Bhatt, Bhargav (2015)
Publisher: Institut des Hautes Études Scientifiques (IHÉS)
I will describe joint work with M. Morrow and P. Scholze on the construction of a new integral cohomology theory for smooth projective schemes over the ring of integers of a p-adic field. The new theory realizes de Rham cohomology as a specialization of etale cohomology (integrally), and thus yields consequences about torsion by semicontinuity.