Search results for "Iago"

Efficient lower and upper bounds of the diagonal-flip distance between triangulations

2006

There remains today an open problem whether the rotation distance between binary trees or equivalently the diagonal-flip distance between triangulations can be computed in polynomial time. We present an efficient algorithm for computing lower and upper bounds of this distance between a pair of triangulations.

Bicausative matrices to measure structural change: Are they a good tool?

1999

The causative-matrix method to analyze temporal change assumes that a matrix transforms one Markovian transition matrix into another by a left multiplication of the first matrix; the method is demand-driven when applied to input-output economics. An extension is presented without assuming the demand-driven or supply-driven hypothesis. Starting from two flow matrices X and Y, two diagonal matrices are searched, one premultiplying and the second postmultiplying X, to obtain a result the closer as possible to Y by least squares. The paper proves that the method is deceptive because the diagonal matrices are unidentified and the interpretation of results is unclear. Keywords : Input-Output ; Ch…

Concrete arch bridges built by lattice cantilevers

2013

In this paper a study about concrete arch bridges built by lattice cantilevers is presented. Lattice cantilevers are partial structures composed of deck, arch, piers and provisional steel diagonals, organized as reticular cantilever girders, in order to build arch bridges without the use of centrings, supports or temporary towers. Characteristics of this construction methodology with its variants are explained together with their implications in the erection sequence. Partial elastic scheme method is implemented in order to find initial forces of temporary cables and a forward analysis is carried out to follow the actual sequence of construction, by extending a procedure already applied to …

Glutamatergic projection from the nucleus incertus to the septohippocampal system

2012

Abstract Recent findings support a relevant role of the nucleus incertus in the control of the hippocampal activity through the modulation of theta rhythm. Previous studies from our group have shown that this nucleus is a critical relay between reticularis pontis oralis and the medial septum/diagonal band, regarded as the main activator and the pacemaker of the hippocampal oscillations, respectively. Besides, the nucleus incertus is highly linked to activated states related to the arousal response. The neurotransmission of the nucleus incertus, however, remains uncertain. Only GABA and the neuromodulator relaxin 3 are usually considered to be involved in its contribution to the septohippoca…

Europa-Santiago de Compostela

1985

Se trata de una nota de José Vidal-Beneyto para Marcelino Oreja sobre el Camino de Santiago (en el marco del Consejo de Europa).

IFS attractors and Cantor sets

2006

Abstract We build a metric space which is homeomorphic to a Cantor set but cannot be realized as the attractor of an iterated function system. We give also an example of a Cantor set K in R 3 such that every homeomorphism f of R 3 which preserves K coincides with the identity on K.

Composition as identity and plural Cantor's theorem

2016

In this paper, I argue that the thesis of Composition as Identity blocks the plural version of Cantor’s Theorem, and that this in turn has implications for our use of Cantor’s theorem in metaphysics. As an example, I show how this result blocks a recent argument by Hawthorne and Uzquiano, and might be turned around to become an abductive argument for Composition as Identity

Noticia de las funciones executadas en la M.N. y M.L. ciudad de Santiago de Chile, por orden de su Presidente y Capitan General Don Ambrosio Higgins …

Text a 1 col Sign.: [ ]2

¡Camarada campesino, joven campesino! Santiago Carrillo, Secretario General de las Juventudes Socialistas Unificadas, ha dicho: ...

Cartell tipogràfic en el qual Santiago Carrillo consciencia a la joventut camperola sobre les bandes armades que recorren els pobles despullant als petits propietaris dels seus béns, i els adverteix que aquests no són antifeixistes sinó aliats inconscients del feixisme

Un afecto a la apostolica iglesia de señor Santiago, y zeloso de sus grandes prerrogativas, y lustre. Contra un papel anonimo, irreverente y opuesto…

1731

Caplletra ornada Sign.: [A]2, B-Mmm2 Port. orlada Text amb postil·les marginals Reclams