1,721,396 research outputs found
Massey products and Fujita decomposition over higher dimensional base
No full textLet f: X→ Y be a semistable fibration between smooth complex varieties of dimension n and m. This paper contains an analysis of the local systems of de Rham closed relative one forms and top forms on the fibers. In particular the latter recovers the local system of the second Fujita decomposition of f∗ωX/Y over higher dimensional base. The so called theory of Massey products allows, under natural Castelnuovo-type hypothesis, to study the finiteness of the associated monodromy representations. Motivated by this result, we also make precise the close relation between Massey products and Castelnuovo-de Franchis type theorems
Metacognizione e valutazione del processo di cambiamento nei pazienti in psicoterapia ad orientamento funzionale
No full textAnalisi della compatibilità tra finanziamento regionale delle aziende sanitarie per quota capitaria e remunerazione delle prestazioni ospedaliere con tariffe DRG
No full textUniversità degli Studi di Torino, Dipartimento di Scienze Economiche e Finanziarie "G. Prato", Quaderno n. 3
Global Kodaira–Spencer class and Massey products
No full textWe define a new notion of supported global deformation class for a semistable family of complex varieties over a curve f : X → B. We use this notion to study when X, possibly up to a finite covering, has a generically finite morphism onto a product B × Y with Y of general type
Statistical analysis of temperature impact on daily hospital admissions: analysis of data from Udine, Italy
No full textThis article is devoted to the analysis of the relationship between the health status of an urban population and meteorological variables. The analysis considers daily number of hospital admissions, not due to surgery, regarding the population resident in the Municipality of Udine, aged 75 and over. Hourly records on temperature, humidity, rain, atmospheric pressure, solar radiation, wind velocity and direction recorded at an observation site located near the center of Udine are considered. The study also considers hourly measures of pollutant concentrations collected by six monitoring stations. All data are relative to the summer periods of years 1995– 2003. Generalized additive models (GAM) are used in which the response variable is the number of hospital admissions and is assumed to be distributed as a Poisson whose rate varies as a possibly non-linear function of the meteorological variables and variables allowing for calendar effects and pollutant concentrations. The subsequent part of the analysis explores the distribution of temperature conditional on the number of daily admissions through quantile regression. A non-linear (N-shaped) relationship between hospital admissions and temperature is estimated; temperature at 07:00 is selected as a covariate, revealing that nighttime temperature is more relevant than daytime. The quantile regression analysis points out, as expected, that the distribution of temperature on days with more admissions has higher q-quantiles with q near unity, while a clear-cut conclusion is not reached for q quantiles with q near 0
FUJITA DECOMPOSITION and MASSEY PRODUCT for FIBERED VARIETIES
No full textLet f: X → B be a semistable fibration where X is a smooth variety of dimension n ≥ 2 and B is a smooth curve. We give the structure theorem for the local system of the relative 1-forms and of the relative top forms. This gives a neat interpretation of the second Fujita decomposition of f∗ωX/B. We apply our interpretation to show the existence, up to base change, of higher irrational pencils and on the finiteness of the associated monodromy representations under natural Castelnuovo-type hypothesis on local subsystems. Finally, we give a criterion to have that X is not of Albanese general type if B= P1
A note on a generalization of the Castelnuovo-de Franchis theorem
No full textWe prove a generalization of the Castelnuovo-de Franchis theorem in the case of p-forms and we apply it to show when, under some natural conditions, a suitable subset of p-forms constructs the Iitaka fibration
Differential forms and quadrics of the canonical image
No full textWe extend the theory of Pirola and Zucconi (J Algebraic Geom 12(3):535–572, 2003). We introduce the new notion of adjoint quadric for canonical images of irregular varieties. Using this new notion, we obtain the infinitesimal Torelli theorem for varieties whose canonical image is a complete intersection of hypersurfaces of degree > 2 and for Schoen surfaces. Finally, we show that a family with fiberwise liftable holomorphic forms such that the fibers have Albanese morphism of degree 1 is birationally trivial if there exist no adjoint quadrics
The Syntax of ne: Some Theoretical Implications
No full textThe article addresses the study of the cliticization properties of Italian clitic "ne", showing that its distribution is due to principled reasons within the theory of syntax, only movement of the clitic from a governed postverbal position being allowed. A comparison between cliticization from a postverbal direct object and postverbal subjects of different nature is assessed in detail
The Layered Syntactic Structure of the Complementizer System: Functional Heads and Multiple Movements in the Early Left-Periphery. A Corpus Study on Italian
Full text linkIn this paper we document the developmental trajectory of the complementizer system (CP-system) in Italian by looking at the earliest spontaneous production of eleven young children, whose transcriptions are available on CHILDES. We conducted a novel corpus analysis, tracking down a number of constructions in which the clausal left-periphery is activated. First, we considered the appearance of the different complementizer particles in the CP-system, which overtly realize the three distinct functional projections ForceP, IntP, and FinP. The analysis revealed that children acquiring Italian correctly use these complementizer particles already in the third year of life. Second, we looked for the simultaneous activation of different functional projections within the CP-system. We went through our corpus searching for complex sentences in which more than one constituent was moved to the left periphery. This option is allowed by the adult grammar of Italian and, as our search revealed, it is also attested in the grammar of young children. Soon after their second birthday, sequences in which a left-dislocated Topic and a Wh- element co-occur are attested, directly supporting the existence of a (high) Topic position above FocusP. Moreover, movement in general conforms to the constraints of the adult grammar, with no attested violation of obligatory inversion (a consequence of the Q-Criterion). Importantly, "why-questions" did not require inversion, much as in the adult grammar of Italian. Taken together, children's use of complementizer particles and their activation of multiple landing sites for movement show that 2-year-olds already possess a richly articulated functional structure of the CP-system, aligned to the layered adult structure. In concluding the paper, we also discuss some temporal differences between constructions activating high and low portions of the CP-system. In particular, we detect a temporal precedence for wh-questions over why-questions. Since the former activate a lower projection, this is consistent with the recently proposed Growing Trees hypothesis, according to which the development of the CP-system proceeds stepwise
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