Search results for "pur"

OPERADS AND JET MODULES

2005

Let $A$ be an algebra over an operad in a cocomplete closed symmetric monoidal category. We study the category of $A$-modules. We define certain symmetric product functors of such modules generalising the tensor product of modules over commutative algebras, which we use to define the notion of a jet module. This in turn generalises the notion of a jet module over a module over a classical commutative algebra. We are able to define Atiyah classes (i.e. obstructions to the existence of connections) in this generalised context. We use certain model structures on the category of $A$-modules to study the properties of these Atiyah classes. The purpose of the paper is not to present any really de…

Projective models of K3 surfaces with an even set

2006

The aim of this paper is to describe algebraic K3 surfaces with an even set of rational curves or of nodes. Their minimal possible Picard number is nine. We completely classify these K3 surfaces and after a carefull analysis of the divisors contained in the Picard lattice we study their projective models, giving necessary and sufficient conditions to have an even set. Moreover we investigate their relation with K3 surfaces with a Nikulin involution.

Effects of clopidogrel, prasugrel and ticagrelor on endothelial function, inflammatory and oxidative stress parameters and platelet function in patie…

2014

Introduction Particularly in the setting of acute coronary syndromes, the interplay between vascular and platelet function has been postulated to have direct clinical implications. The present trial is designed to test the effect of clopidogrel, prasugrel and ticagrelor on multiple parameters of vascular function, platelet aggregation, oxidative and inflammatory stress before and up to 4 weeks after coronary artery stenting. Methods and analysis The study is designed as a three-arm, parallel design, randomised, investigator-blinded study. Patients with unstable angina or non-ST elevation myocardial infarction undergoing coronary intervention with a drug-eluting stent will be randomised to r…

Varieties of algebras with pseudoinvolution and polynomial growth

2017

Let A be an associative algebra with pseudoinvolution (Formula presented.) over an algebraically closed field of characteristic zero and let (Formula presented.) be its sequence of (Formula presented.) -codimensions. We shall prove that such a sequence is polynomially bounded if and only if the variety generated by A does not contain five explicitly described algebras with pseudoinvolution. As a consequence, we shall classify the varieties of algebras with pseudoinvolution of almost polynomial growth, i.e. varieties of exponential growth such that any proper subvariety has polynomial growth and, along the way, we shall give also the classification of their subvarieties. Finally, we shall de…

Tiedonarkeologisia pohdintoja Viipurin vuoden 1918 haudatuista muistoista

2021

The subject of the article is the ‘memory war’ over the memory of the Civil War of 1918 in Vyborg, and the displaced Karelians’ experience in the time of diaspora. Until the wars of 1939–1945 the culture of remembrance of the Civil War was divided in Vyborg and in Finland and many truths of the war were maintained in the Red’s and White’s own groups. The article details how the dichotomous history culture of Civil War memories has slowly transformed into a diversified and critical analysis over the past one hundred years. The qualitative material used in the article consists of memory data written by displaced Karelians held in Finnish archives. The article is a knowledge-archaeological ana…

Viipurin poliittiset jännitteet : tapahtumia ja historiografiaa

2019

Todeksi uskottua : kansandemokraattinen Neuvostoliitto-journalismi rajapinnan tulkkina vuosina 1964-1973

2008

Aimo Ruususen väitöstutkimus paljastaa, miten ideologiset ja muut riippuvuudet näkyivät suomalaisten kansandemokraattisten toimittajien työssä kylmän sodan vuosina ja Neuvostoliiton historian mielenkiintoisena ajanjaksona 1960-luvun puolivälistä alkaen.- Kansandemokraattisissa sanomalehdissä vaiettiin joistakin Neuvostoliiton kannalta epäedullisista asioista, vaikka sellaisistakin eräissä kriisitapauksissa kerrottiin, Ruusunen kertoo.Tämän lehtiryhmän toimittajat olivat kahden erilaisen kulttuurin välisellä rajapinnalla ja sen tulkkeina erikoisessa asemassa. Toisaalta heillä oli paljon mahdollisuuksia tiedon saantiin, toisaalta heillä oli ideologisia esteitä asioiden julkiseen pohdintaan. K…

CCDC 663831: Experimental Crystal Structure Determination

2007

Related Article: S.Buehler, D.Schollmeyer, D.Hauser, S.Laufer, C.Peifer|2007|Acta Crystallogr.,Sect.E:Struct.Rep.Online|63|o4154|doi:10.1107/S1600536807044212

The UK needs a sustainable strategy for COVID-19

2020

The UK is well into the second wave of COVID-19, with 60 051 lives lost to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection to date, according to provisional data from the Office for National Statistics. Official UK Government data show that cases have been rising exponentially since late August, 2020, with increases across all regions in England in recent weeks.As of Nov 4, 2020, the UK had 25 177 confirmed daily cases. These are almost certainly underestimates as between Oct 17 and Oct 23, 2020, England alone had 52 000 estimated daily cases.Estimates of the effective reproduction number in England vary between 1.1 and 1.6.Daily deaths have doubled every fortnight si…

The average element order and the number of conjugacy classes of finite groups

2021

Abstract Let o ( G ) be the average order of the elements of G, where G is a finite group. We show that there is no polynomial lower bound for o ( G ) in terms of o ( N ) , where N ⊴ G , even when G is a prime-power order group and N is abelian. This gives a negative answer to a question of A. Jaikin-Zapirain.