Search results for " formal"
showing 10 items of 273 documents
Non linear pseudo-bosons versus hidden Hermiticity
2011
The increasingly popular concept of a hidden Hermiticity of operators (i.e., of their Hermiticity with respect to an {\it ad hoc} inner product in Hilbert space) is compared with the recently introduced notion of {\em non-linear pseudo-bosons}. The formal equivalence between these two notions is deduced under very general assumptions. Examples of their applicability in quantum mechanics are discussed.
Contour calculus for many-particle functions
2019
In non-equilibrium many-body perturbation theory, Langreth rules are an efficient way to extract real-time equations from contour ones. However, the standard rules are not applicable in cases that do not reduce to simple convolutions and multiplications. We introduce a procedure for extracting real-time equations from general multi-argument contour functions with an arbitrary number of arguments. This is done for both the standard Keldysh contour, as well as the extended contour with a vertical track that allows for general initial states. This amounts to the generalization of the standard Langreth rules to much more general situations. These rules involve multi-argument retarded functions …
Genericity of dimension drop on self-affine sets
2017
We prove that generically, for a self-affine set in $\mathbb{R}^d$, removing one of the affine maps which defines the set results in a strict reduction of the Hausdorff dimension. This gives a partial positive answer to a folklore open question.
On modal mu-calculus over finite graphs with bounded strongly connected components.
2010
For every positive integer k we consider the class SCCk of all finite graphs whose strongly connected components have size at most k. We show that for every k, the Modal mu-Calculus fixpoint hierarchy on SCCk collapses to the level Delta2, but not to Comp(Sigma1,Pi1) (compositions of formulas of level Sigma1 and Pi1). This contrasts with the class of all graphs, where Delta2=Comp(Sigma1,Pi1).
Russian Formalism vs Germanic Formalism: exploring the concept of European Formalism
2021
Abstract This comparative reading of two conceptual corpora, Russian formalism and Germano-Austrian or Germanic formalism, begins with the idea that the European formalism presents a coherent unit. The continuity of this program authorizes such a comparative reading. The comparative analysis of formalisms in Europe could be a research program aimed at an epistemological reading of the phenomenon of European formalism at the turn of the 20th century. This program deals with a rereading of two conceptual fields–Russian formalism and Germanic (Germano-Austrian) formalism. This study seeks to contextualise the formalist project within the knowledge of its time by showing its genetic links with …
The Formal Redox Potential of the Ti(IV, III) Couple at 25 °C in 1 M HCl 2 M NaCl Medium
2007
The formal redox potential of the Ti(IV, III) couple has been determined at 25 degrees C in 1 M HCl, 2 M NaCl aqueous medium, by emf measurements of a junction-free cell with glass and mercury electrodes. Ti(III) and Ti(IV) concentrations were changed by controlled electrolysis. The mean value of the searched formal potential, in a large range of total titanium concentration, is 9 +/- 1 mV against the molar hydrogen electrode in the same ionic medium.
Fazioni e popolo in una provincia del dominio pontificio fra XIII e XIV secolo
2021
Between the 13th and 14th centuries, a number of cities in the inchoative papal state experimented a system of self-government that allowed the Guelph and Ghibelline factions, formally represented in those same bodies on an equal footing, to work alongside the more strictly communal magistracies. The case of Todi is rather well known, given the role that Bartolo da Sassoferrato assigns to it in his Tractatus de guelphis et gebellinis (ca. 1350), but current research has already ascertained that this political tradition appeared at least around 1260. Some evidence can suggest, however, that some form of integration of factions into the local institutional framework was possible elsewhere, an…
Determinants and effects of external knowledge search: Focusing on organizational formal structure
2013
Tesis Doctoral presentada por Ana García Granero en el Departament de Direcció d'Empreses "Juan José Renau Piqueras" de la Universitat de València - Facultat d'Economia y realizada en el Instituto de Gestión de la Innovación y del Conocimiento (INGENIO, CSIC-UPV).
Materials de l'assignatura 33257 - Pensament Crític del Grau en Filosofia de la Universitat de València, curs acadèmic 2022-23
2023
El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València. Materials de l'assignatura 33257 - Pensament Crític del Grau en Filosofia de la Universitat de València, curs acadèmic 2022-23.
Estructura y evolución formal en las cruces parroquiales valencianas (s. XIV-XX)
2012
La platería valenciana se va conociendo poco a poco a pesar de que su estudio formalista ha empezado con posterioridad a otras tierras de España. El presente artículo, junto con otro dedicado a su iconografía ya publicado, quiere culminar el estudio global de las cruces procesionales valencianas. En él se analiza la estructura y la evolución formal de este objeto litúrgico desde el siglo XIV hasta el siglo XX, destacando sus obras y autores más importantes –Pere Capellades, Bernat Joan Cetina, Joan Calderón, Lluís Perales, etc.– y se subraya la importancia del platero Simó de Toledo, que, en el siglo XVII, creó una tipología de cruz, cuyos ecos advertimos incluso en el siglo XX. Valencian s…