Search results for "partitions"

Conjugate unstable manifolds and their underlying geometrized Markov partitions

2000

Abstract Conjugate unstable manifolds of saturated hyperbolic sets of Smale diffeomorphisms are characterized in terms of the combinatorics of their geometrized Markov partitions. As a consequence, the relationship between the local and the global point of view is also made explicit.

Identity dynamics and social partitions : the case of identity "racial" Blacks in France

2011

Our research work investigates - from a psycho-social point of view - the «racial» identity of the black population in France, notably in their relation with the white population, so as to point up the identity dynamics that exist between the various groups. The theoretical framework is related to social grouping and one of its developments, i.e. the concept of social partitioning. Such conception is based on the existence of several types of inter-category relations (partitioning) that allow apprehending the nature of individuals’ identity positioning within the framework of an inter-group relation and make it dynamic through the notion of co-construction. Our methodology is based mainly o…

Ewa Korzeniowska jako matka - strażniczka ogniska domowego. Wychowanie w kresowej rodzinie szlacheckiej na ziemiach polskich pod zaborami w okresie m…

2015

W artykule przedstawiam portret Ewy Korzeniowskiej, matki Josepha Conrada oraz siostry Tadeusza Bobrowskiego, na której życie osobiste (podobnie jak na życie wielu kresowych szlachcianek) przemożny wpływ miała historia. Polityka, jaką Rosja carska stosowała wobec Polaków, którzy ośmielili się marzyć o niepodległości w sposób dramatyczny naznaczyła całe jej życie. Z jej korespondencji oraz przekazu bliskich jej osób wyłania się portret prawdziwej matki Polki oddanej swojej rodzinie i ojczyźnie.

Dwie drogi ze Wschodu na Zachód. Szkic biograficzny do historii polskich losów XIX i XX wieku

2020

The article was inspired by the biography of Zofia Kossak-Szczucka. The rich life of Zofia Kossak was full of extraordinary situations and twists and turns, but above all, her life was characterized by a constant journey. The road from one end of Europe – Ukraine, to the other – the British Isles. Her story became a pretext for presenting the path that two other Poles traveled from the eastern ends of Europe towards its heart and western borders. The first of them was known, although widely, but only from one chapter of the biography – Gabriel Narutowicz. An extremely interesting figure, who came to Switzerland from Lithuania for health reasons in the mid-1880s. He has found his new home in…

Space partitioning of exchange-correlation functionals with the projector augmented-wave method

2018

We implement a Becke fuzzy cells type space partitioning scheme for the purposes of exchange-correlation within the GPAW projector augmented-wave method based density functional theory code. Space partitioning is needed in the situation where one needs to treat different parts of a combined system with different exchange-correlation functionals. For example, bulk and surface regions of a system could be treated with functionals that are specifically designed to capture the distinct physics of those regions. Here, we use the space partitioning scheme to implement the quasi-nonuniform exchange-correlation scheme, which is a useful practical approach for calculating metallic alloys on the gene…

Influence minoritaire et partitions sociales : une étude exploratoire. 2ème Colloque International de Psychologie Sociale et Communication

2007

The co-construction of the identical positionings of teachers and pupils in physical education

2015

This doctoral work is interested in the identical positionings of the teachers and the pupils led by the relation that the social scene in Physical Education establishes between them. These positionings are approached by means of the theories bound to the social categorization and more precisely the theory of the social identity, the theory of the auto-categorization and the conception of the social partitions. If the social partitions establish a continuation of the first two theories, they also rest on their own theoretical foundation, based on social psychology of the language. The goal of the first work was to propose a review of certain principles of the social categorization. This pro…

MR2944786 Reviewed Turzański, Marian The Bolzano-Poincaré-Miranda theorem—discrete version. Topology Appl. 159 (2012), no. 13, 3130–3135. (Reviewer: …

2014

The author gives a discrete version of the Bolzano-Poincaré-Miranda theorem. Further, the author uses the main result to prove the Bolzano-Poincaré-Miranda theorem and a theorem on partitions.

Counting Berg partitions via Sturmian words and substitution tilings

2013

We develop the connection of Berg partitions with special substitution tilings of two tiles. We obtain a new proof that the number of Berg partitions with a fixed connectivity matrix is equal to half of the sum of its entries, [12]. This approach together with the formula of Seebold [10], for the number of substitutions preserving a given Sturmian sequence, shows that all of the combinatorial substitutions can be realized geometrically as Berg partitions. We treat Sturmian tilings as intersection tilings of bi-partitions. Using the symmetries of bi-partitions we obtain geometrically the palindromic properties of Sturmian sequences (Theorem 3) established combinatorially by de Luca and Migno…

Statistically validated hierarchical clustering: Nested partitions in hierarchical trees

2022

We develop an algorithm that is fast and scalable in the detection of a nested partition extracted from a dendrogram that is obtained from hierarchical clustering of a multivariate series. Our algorithm provides a -value for each clade observed in the hierarchical tree. The -value is obtained by computing many bootstrap replicas of the dissimilarity matrix and by performing a statistical test on each difference between the dissimilarity associated with a given clade and the dissimilarity of the clade of its parent node. We prove the efficacy of our algorithm with a set of benchmarks generated by a hierarchically nested factor model. We compare results obtained by our algorithm with those of…