1,720,976 research outputs found
Deformations and rigidity for mixed period maps
Get PDFWe prove a rigidity criterion for period maps of admissible variations of graded-polarizable mixed Hodge structure, and establish rigidity in a number of cases, including families of quasi-projective curves, projective curves with ordinary double points, the complement of the canonical curve in families of Kynev–Todorov surfaces, period maps attached to the fundamental groups of smooth varieties and normal functions.</p
Differential geometry of the mixed Hodge metric
No full textWe investigate properties of the mixed Hodge metric of a mixed period domain. In particular, we calculate its curvature and the curvature of the Hodge bundles. We also consider when the pull back metric via a period map is Kähler. Several applications in cases of geometric interest are given, such as for normal functions and biextension bundles
Indecomposable {} classes on a surface and membrane integrals
Get PDFLet X be a projective algebraic surface. We recall the K-group K1,ind(2) (X) of indecomposables and provide evidence that membrane integrals are sufficient to detect these indecomposable classes
Remarks on eigenspectra of isolated singularities
Get PDFWe introduce a simple calculus, extending a variant of the Steenbrink
spectrum, for describing Hodge-theoretic invariants of (smoothings of) isolated
singularities with (relative) automorphisms. After computing these
"eigenspectra" in the quasi-homogeneous case, we give three applications to
singularity bounding and monodromy of VHS.Comment: 25 pages; version to appear in Pacific Journal of Mathematic
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
- …
