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Of all publications in the section: 3 853
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Working paper
Cheltsov I., Zhang K., Rubinstein Y. math. arxive. Cornell University, 2018
The purpose of this article is to develop techniques for estimating basis log canonical thresholds on logarithmic surfaces. To that end, we develop new local intersection estimates that imply log canonicity. Our main motivation and application is to show the existence of Kahler-Einstein edge metrics on all but finitely many families of asymptotically log del Pezzo surfaces, partially confirming a conjecture of two of us. In an appendix we show that the basis log canonical threshold of Fujita-Odaka coincides with the greatest lower Ricci bound invariant of Tian.
Working paper
Tenisheva K., Alexandrov D. A. Humanities. HUM. Basic Research Programme, 2013
Our study contributes to the debate on the interaction between academic context, individual achievement, and mathematics self-concept in schools. It is known that high-achieving peers positively influence the individual achievements of all group members. At the same time, it has been shown that the self-concept of students tends to decrease in the presence of high-achieving peers, as individuals make relative judgments of their abilities vis-à-vis their peer group. Stu-dents with mediocre performance feel more confident about their abilities in a group of poor achievers (the Big-Fish-Little-Pond Effect – BFLPE – introduced by H.Marsh). On the other hand, perceived prestige of a school enhances the self-confidence of students as people tend to “bask in the glory” of others (the “reflected glory” effect). We test the two effects mentioned above – BFLPE and the “reflected glory” effect. We hypothesize that both effects are stronger in highly stratified education systems where there is a stronger explicit difference between high- and poor-achieving students, and schools are ranked by their prestige. We compare the interac-tion of academic context, achievement, and mathematics self-concept in stratified (Russia and Czech Republic) and non-stratified (Norway and Sweden) educational systems on the TIMSS’07 database using HLM7. Our study shows: 1) an absence of BFLPE for all four countries, i.e. the achievement of others is positively related to an individual’s math self-concept; 2) strong support for the “reflected glory” effect is found only in stratified educational systems; and 3) greater pos-itive effect on self-concept for students with poor achievement who study in the best schools.
Working paper
Vladimir L. Popov. arxiv.org. math. Cornell University, 2015. No. 1504.03867.
Exploring Bass' Triangulability Problem on unipotent algebraic subgroups of the affine Cremona groups, we prove a triangulability criterion, the existence of nontriangulable connected solvable affine algebraic subgroups of the Cremona groups, and stable triangulability of such subgroups; in particular, in the stable range we answer Bass' Triangulability Problem is the affirmative. To this end we prove a theorem on invariant subfields of $1$-extensions. We also obtain a general construction of all rationally triangulable subgroups of the Cremona groups and, as an application, classify rationally triangulable connected one-dimensional unipotent affine algebraic subgroups of the Cremona groups up to conjugacy.
Working paper
A. Levin, Olshanetsky M., Zotov A. arxiv.org. math. Cornell University, 2015
It was shown in our previous paper that quantum ${\rm gl}_N$ $R$-matrices satisfy noncommutative analogues of the Fay identities in ${\rm gl}_N^{\otimes 3}$. In this paper we extend the list of $R$-matrix valued elliptic function identities. We propose counterparts of the Fay identities in ${\rm gl}_N^{\otimes 2}$, the symmetry between the Planck constant and the spectral parameter, quasi-periodicities with respect to these variables, the Kronecker double series representation of the R-matrix. As an application we construct $R$-matrix valued $2N^2\times 2N^2$ Lax pairs for the Painlev\'e VI equation (in the elliptic form) with four free constants using ${\mathbb Z}_N\times {\mathbb Z}_N$ elliptic $R$-matrix. More precisely, the four free constants case appears for an odd $N$ while even $N$'s correspond to a single constant.
Working paper
Shpakovskaya L. L. Humanities. HUM. Basic Research Programme, 2015. No. WP BRP 87/HUM/2015.
The working paper represents a study of motherhood as a specific semantic construct in contemporary Russia. The author analyses the ways in which knowledge about motherhood produces specific maternal experience. The general theoretical framework is the foucauldian concept of discursive power based on knowledge. At the same time, motherhood is viewed as a class differentiated practice. The primary focus of the analysis is motherhood as experienced by Russian middle class women. The paper discuss how motherhood is discursively produced in the Russian context. The author is interested in the knowledge and discourses that Russian middle class women employ in order to become aware of their motherhood and describe themselves as mothers. The paper describes critical sociological theories of motherhood connecting this phenomenon to such concepts as power, social order and social inequalities. These critical approaches deconstruct the motherhood discourse and reveal that the mother becomes a point of production of social and political order of the modern societies. The analysis of the Russian discourse on motherhood in the political and cultural context is presented by the author as well. The paper elaborates upon the category of “responsibility” as the primary meaning component of middle class motherhood. In the conclusion the issue of why and when Russian mothers are considered “responsible” is discussed
Working paper
Mitrofanova E. Basic research program. WP BRP. National Research University Higher School of Economics, 2017. No. 78/SOC/2017.
The aim of this study is to compare the sociodemographic events marking the transition to adulthood in France, Estonia and Russia: first leaving parents, completion of education, first partnership, first marriage and first childbirth. We used the first waves of the Generations and Gender Survey for these three countries and an advanced method – Sequence Analysis. According to the Second Demographic Transition Theory, we expected a convergence in the sequencing, timing and tempo of the occurrence of target events. The results showed the slow convergence of sequences, but not of timing and tempo. Estonia and Russia are still close in the timing of the occurrence of events, but in tempo Estonia and France are more alike. The ages at which people start families in Estonia and Russia have decreased in younger generations in comparison with older ones, despite our expectation that they would increase. For the youngest generation (1970s), the time between leaving parents and becoming a parent is 5-7 years in France, 4-6 years in Estonia and 2-3 years in Russia. The sociodemographic behaviour of Estonians clearly positions them between Europe and Russia. Thus, the comparison of France, Estonia and Russia only partially confirms the Second Demographic Transition Theory.
Working paper
Mitrofanova E. Working Papers. SSRN, 2017
The aim of this study is to compare the sociodemographic events marking the transition to adulthood in France, Estonia and Russia: first leaving parents, completion of education, first partnership, first marriage and first childbirth. We used the first waves of the Generations and Gender Survey for these three countries and an advanced method – Sequence Analysis. According to the Second Demographic Transition Theory, we expected a convergence in the sequencing, timing and tempo of the occurrence of target events. The results showed the slow convergence of sequences, but not of timing and tempo. Estonia and Russia are still close in the timing of the occurrence of events, but in tempo Estonia and France are more alike. The ages at which people start families in Estonia and Russia have decreased in younger generations in comparison with older ones, despite our expectation that they would increase. For the youngest generation (1970s), the time between leaving parents and becoming a parent is 5-7 years in France, 4-6 years in Estonia and 2-3 years in Russia. The sociodemographic behaviour of Estonians clearly positions them between Europe and Russia. Thus, the comparison of France, Estonia and Russia only partially confirms the Second Demographic Transition Theory.
Working paper
Mitrofanova E. Working Papers. . RePEc, 2017
The aim of this study is to compare the sociodemographic events marking the transition to adulthood in France, Estonia and Russia: first leaving parents, completion of education, first partnership, first marriage and first childbirth. We used the first waves of the Generations and Gender Survey for these three countries and an advanced method – Sequence Analysis. According to the Second Demographic Transition Theory, we expected a convergence in the sequencing, timing and tempo of the occurrence of target events. The results showed the slow convergence of sequences, but not of timing and tempo. Estonia and Russia are still close in the timing of the occurrence of events, but in tempo Estonia and France are more alike. The ages at which people start families in Estonia and Russia have decreased in younger generations in comparison with older ones, despite our expectation that they would increase. For the youngest generation (1970s), the time between leaving parents and becoming a parent is 5-7 years in France, 4-6 years in Estonia and 2-3 years in Russia. The sociodemographic behaviour of Estonians clearly positions them between Europe and Russia. Thus, the comparison of France, Estonia and Russia only partially confirms the Second Demographic Transition Theory.
Working paper
Zaporozhets O. Гуманитарные исследования. WP6. Высшая школа экономики, 2014. No. BRP 52.
This paper focuses on a subway user, one of the main characters of mundane mobility in big cities. It is based on the field research conducted by the author in two Russian cities (Moscow and Kazan) in 2013-2014. The subway is considered not only as public transportation, but more broadly as a regulation tool that is used by homo mobilis to construct a wide network of relationships: with the city, with time, with one's daily activities. The notion of “affect management” - the urbanite's ability to manage their own emotional states and experiences - is suggested to describe the role of the subway in everyday life planning
Working paper
D. Kaledin. arxiv.org. math. Cornell University, 2013
We propose a non-commutative generalization of Beilinson's Conjecture on the regulator map from algebraic K-theory to Deligne cohomology of algebraic varieties over Q. We also check a baby case of the generalized conjecture, namely, the case of finite-dimensional associative algebras.
Working paper
Dumanski I., Feigin E., Finkelberg M. V. arxiv.org. math. Cornell University, 2020. No. 2003.12930.
We compute the spaces of sections of powers of the determinant line bundle on the spherical Schubert subvarieties of the Beilinson- Drinfeld affine Grassmannians. The answer is given in terms of global Demazure modules of the current Lie algebra.
Working paper
Schang F. The Right to Believe: Perspectives in Religious Epistemology. ISBN 9783868381320. Ontos Verlag, 2012
An argument for the rationality of religious belief in the existence of God is defended. After reviewing three preconditions for rational belief, I show reasons to privilege the criterion of consistency. Taking the inconsistency of the religious belief in God and the belief in the scientificworld picture as the impediment to a rational belief in God, I propose that we can overcome thisobjection by assuming, firstly, that God is a universal class. This allows us to put the problem of God in set-theoretic terms, such that the antinomy that follows from such an assumption can beovercome by assuming that God is not a subject but a strict class that cannot be individuated. I conclude that that the self-contradictory nature of God does not prevent the believer from making arational, ethical assessment that the contradiction resides in the possibility of using language toexplain his existence, but that this does not make belief in the existence of God unjustifiable – onthe contrary. In this way, we can say statements that claim God exists are justifiable.
Working paper
Mozias P., De Conti B. Texto para discussao. ISSN 0103-9466. IE, Campinas, 2019. No. 366.
China’s initiative about “One Belt, One Road” could be treated ambiguously. On the one hand, it is intended to transform the newly acquired economic potential of that country into her higher status in the world. China invites a lot of nations to build up gigantic transit corridors by joint efforts, and doing so she applies productively her capital and technologies. International transactions in RMB are also being expanded. But, on the other hand, “One Belt, One Road” is also a necessity for China to cope with some evident problems of her current stage of development, such as industrial overcapacity, overdependence on imports of raw materials from a narrow circle of countries, and a subordinate status in global value chains. For Russia a participation in “One Belt, One Road” may be fruitful, since the very character of that project provides us with a space to manoeuvre. By now, Russian exports to China consist primarily of fuels and other commodities. More active industrial policy is needed to correct this situation. A flexible framework of “One Belt, One Road” is more suitable for this objective to be achieved, rather than traditional forms of regional integration, such as a free trade area.
Working paper
Rozhkov K. L. Management. MAN. Высшая школа экономики, 2012. No. 05.
The paper shows relationships between characteristics of residents and places where they live. A combination of three criteria of place attractiveness (retention and attraction, conditions for natural growth, and settling) was chosen to classify place market segments, and profiles of beneficiaries for all the segments on the theoretical level were built. The results of the empirical study partially confirm developed theoretical typologies. Two methods to segment place market are equal only if expectations of population are constant. Study results allow place marketers to identify emerging shifts in the structure of beneficiaries of specific places and predict their further evolution.
Working paper
Pavlov A. math. arxive. Cornell University, 2015. No. 1511.05089.
Working paper
Tretyakov S. V. Высшая школа экономики, 2014. No. 1.
The main idea of this paper is that some sort of legal theory dealing with the law’s social impact is an indispensable element of the legal profession in the time of late modernity. Can legal theory provide an adequate understanding of the social context of the application of law, relying solely on internal resources? If not, which interdisiplinary discourse is the best and why?
Working paper
Di Puppo L. Silk Road Papers. Central Asia-Caucasus Institute & Silk Road Studies Program, 2010
One major repercussion of the Russian-Georgian war of August 2008 was a significant increase in the EU‟s presence in Georgia. With the launch of the Eastern Partnership in May 2009, the deployment of an EU monitoring mis-sion in Georgia and the EU‟s participation in the Geneva talks, EU-Georgian relations appear to have entered a new stage. The war has also affected Geor-gia‟s foreign policy priorities with the EU acquiring a new significance at the same time as the prospect of NATO integration has become more uncertain. This paper reviews the evolution of EU-Georgian relations since Georgia‟s independence and asks whether the post-war context has brought a change in the nature of these relations. First, it analyzes the relations before the Rose Revolution and the nature of the EU‟s engagement in Georgia. Second, it ex-amines the changes after the revolution, focusing in particular on the diverg-ing expectations of the EU and Georgia. Finally, it asks whether the post-war context has brought more convergence between the two actors.
Working paper
Gimpelson V. E., Kapeliushnikov R. IZA Discussion Paper. IZA, 2014. No. 8279.
Economic growth in Russia in the first decade of this century almost doubled the country’s GDP but was accompanied by substantial reallocation of labor to the unregulated sector while formal employment was on gradual decline. The paper overviews evolution of the Russian labour market during the period of 2000-10 and discusses most general implications of informality to employment and earnings as well as the associated political economy challenges and consequences.