648 research outputs found
Master index
Pla general, del mural ceràmic que decora una de les parets del vestíbul de la Facultat de Química de la UB. El mural representa diversos símbols relacionats amb la química
Iterated extended ultrapowers and supercompactness without choice
AbstractWorking in ZF + DC with no additional use of the axiom of choice, we show how to iterate the extended ultrapower construction of Spector (1988, 1991). This generalizes the technique of iterated ultrapowers to choiceless set theory. As an application, we prove the following theorem: Assume V = LU[Pκ(λ)] + “κ is λ-supercompact with normal ultrafilter U” + DC. Then for every sufficiently large regular cardinal ρ, there exists a set-generic extension V[G] of the universe in which there exists for some σ a set S ⊆ Pρ(σ) for which one can define an elementary embedding j mapping V to LD[S], where D is the filter in V[G] generated by the closed unbounded filter (according to V) on Pρ(σ). Moreover, we have j(κ) = ρ, j(λ) = σ, j(Pκ(λ)) = S (which is Pρ(σ) according to LD[S]), and j(itU) = D ∩ LD[S] i s a normal ultrafilter in LD[S] on Pρ(σ)
Abstract
Mapa de Barcelona al terra del Passeig Lluis Companys; en commemoració del Tricentenari 1714-2014
Author Index
Primer pla, lateral, de l'escultura d'acer corten situada sobre un piló de pedra. És una donació del Dr. Andreu i està col·locada al Col·legi de Metges de Barcelona
Visual binding of luminance, motion and disparity edges
AbstractVisual binding of edge segments embedded in noise and created by luminance, motion and disparity contrasts were studied in three experiments. The results showed that path formation was limited by the same rules across all attributes tested. The first experiment showed that binding could be accomplished with either attribute used in isolation. The second experiment showed that closed paths were easier to detect than open paths irrespectively of the attributes used to create the path elements. No additive effects were found in either Experiment 1 or 2 when the path elements were created with several attributes superimposed on the same positions, compared to when only one attribute was used along the path. In Experiment 3 it was found that when another attribute was added between the positions of the first attribute along the path, so that two attributes alternated along the path, the performance of path detection was better than expected by probability summation estimated from the single attribute conditions. These results provide evidence for attribute-invariant Gestalt laws and provide clues about the underlying neural mechanisms
Estudi, avaluació i catalogació de les bodegues emblemàtiques de Barcelona
Sol·licitant de l’informe: Gerència d'Urbanism
Estudi comparatiu de catàlegs i plans especials de protecció del patrimoni urbà d'àmbit internacional : 2019
Sol·licitant de l’informe: Gerència Adjunta d'Urbanism
Estudi històric de la finca Torre Girona de Barcelona
Sol·licitant de l'informe: Gerència de l'Arquitecte/a en Ca
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