Fundamental domain of invariant sets and applications

Let $X$ be a compact metric space and $f:X\to X$ a homeomorphism on $X$. We construct a fundamental domain for the set with finite peaks for each cocycle induced by $\phi\in C(X,R)$. In particular we prove that if a partially hyperbolic diffeomorphism is accessible, then either the set with finite peaks for the Jacobian cocycle is of full volume, or the set of transitive points is of positive volume

Fuzzy Bigraphs: An Exercise in Fuzzy Communicating Agents

Bigraphs and their algebra is a model of concurrency. Fuzzy bigraphs are a generalization of birgraphs intended to be a model of concurrency that incorporates vagueness. More specifically, this model assumes that agents are similar, communication is not perfect, and, in general, everything is or happens to some degree.Comment: 11 pages, 3 figure

Zsidók és zsidóság neves történészek 1945 előtti munkáiban

Magyar: Egy elfogadott eszmetörténeti közelítési mód szerint az eszmék az őket hordozó nyelven keresztül hatnak, létrehozzák szótárukat, hatásukat az általuk megteremtett nyelvezeten keresztül fejtik ki. Az eszmék közötti vita és csere is e nyelvi eszközök segítségével zajlik. Amit megkísérlek, az néhány példa bemutatása, hogy a (kinél-kinél igen különböző mértékű) antiszemita beszédmód mögött milyen eszmék húzódhattak meg a korabeli történészek körében. Példaként a céhbeliek közül Szekfű Gyulát, Mályusz Elemért, Hajnal Istvánt, esetleg Farkas Gyulát, illetve Szabó Istvánt hozom, és a sort kiegészítem két nagyhatású, de nem céhbeli történetíróval, Erdei Ferenccel és Bibó Istvánnal. English: Title: Jews and Jewry in Distinguished Historians’ pre-1945 Works Abstract: As one of the recognized approaches of the history of ideas suggests ideas are constituted and conveyed through verbal language. Debates and exchange among ideas also take place through language. In this paper I attempt to introduce some of the ideas that underlined (to different extents) the anti-Semitic discourse of historians. For example I will explore Gyula Szekfű, Elemér Mályusz, István Hajnal, maybe include Gyula Farkas and István Szabó, and will complete the list with two significant thinkers Ferenc Erdei and István Bibó

Genericity in Topological Dynamics

We study genericity of dynamical properties in the space of homeomorphisms of the Cantor set and in the space of subshifts of a suitably large shift space. These rather different settings are related by a Glasner-King type correspondence: genericity in one is equivalent to genericity in the other. By applying symbolic techniques in the shift-space model we derive new results about genericity of dynamical properties for transitive and totally transitive homeomorphisms of the Cantor set. We show that the isomorphism class of the universal odometer is generic in the space of transitive systems. On the other hand, the space of totally transitive systems displays much more varied dynamics. In particular, we show that in this space the isomorphism class of every Cantor system without periodic points is dense, and the following properties are generic: minimality, zero entropy, disjointness from a fixed totally transitive system, weak mixing, strong mixing, and minimal self joinings. The last two stand in striking contrast to the situation in the measure-preserving category. We also prove a correspondence between genericity of dynamical properties in the measure-preserving category and genericity of systems supporting an invariant measure with the same property.Comment: 48 pages, to appear in Ergodic Theory Dynamical Systems. v2: revised exposition, added proof that the universal odometer is generic among transitive Cantor homeomorphism

Short theoretic summary of the M & A activity and overview of the trends in Hungary from 2002 to 2008

Since 1989 the mergers and acquisitions have had great influence on the Hungarian economy. After the decline in the early 2000s the level of the M & A activity became higher, but the composition of the deal types and driving forces changed.This study makes an attempt to identify the new trends of the M & A figures in Hungary and to address the greatest problems in this field of research, the imperfect data and the traceable inconsistencies. The results show high level of concentration of the deals in the origination of the buyers and in case of value of the deals. After 2006 the minority stake purchase became more significant through high value ,,mega-deals´´

Costs and Benefits of Integrating Poultry into Cover Crop - Vegetable Rotations

Integrated livestock systems were once common leading up to the 20th century where livestock generated manure that was then used to fertilizer crop production in a closed- or semi-closed system. However, with the industrialization of agriculture in the mid to late 20th century, specialization drove simplified systems that segregated livestock from cropping systems. This segregation led to nutrient surpluses occurring in livestock operations, and nutrient demands in cropping systems creating a plethora of environmental issues. With the increased awareness of environmental issues, a renewed interest in integration has driven producers and researchers to experiment with integration again. For research, the emphasis has been on cattle, sheep, goats, and agronomic crops (corn, soybean, cotton, wheat, peanuts, oats, canola, sorghum). Despite this increased interest, little scientific research has investigated the costs and benefits of the rotational integration of poultry and vegetable systems. In my thesis, I investigate the effects of integrating poultry at three differing stocking densities to better understand their effects on vegetable yields, cover crop biomass, and arthropod abundance in an annual vegetable, cover crop system. Across three years of a rotational integration study (spring vegetable, summer cover crop, fall poultry, winter cover crop), I found that spring vegetable yields increased following fall poultry, but only under a higher stocking density. Additionally, I find that manure deposition in the higher stocking density can largely replace the need for pre-plant fertilizer. Poultry had complex impacts on cover crop biomass throughout the rotational system. Fall pastured poultry integrated on cover crops reduced summer cover crop biomass as they are moved across the pasture. This effect is largely due to the trampling and consumption of vegetation by the broiler chickens. However, I found that the winter cover crop biomass in the spring was higher in the poultry plots compared to the no-poultry control plots likely through the poultry manure stimulating cover crop growth. Finally, I found complex annual impacts of poultry integration effects on arthropod communities across multiple taxonomic groups. Insect communities fluctuated in population in the fall rotational sequence stemming from the bottom-up effects of manure deposition and the top-down effects of insect habitat destruction occurring when poultry are integrated with the cover crop. The fresh manure attracted large populations of flies (Diptera) that then recruited large numbers of predatory beetles (Staphylinidae) as seen in pitfall traps. Additionally, the destruction of vegetative habitat (cover crop) by the poultry caused a loss of insect population as seen in sweep net samples. Overall, the heightened insect populations did not persist into the spring and summer rotational sequences. Overall, this study demonstrates that poultry stocking density plays an important role in increasing vegetable yields and decreasing fertilizer input reliance. Furthermore, manure deposition from poultry is shown to increase cover crop biomass in the following time points and also increases arthropod populations that then decrease in numbers as the manure resource diminishes