The conceptual spaces approach has recently emerged as a novel account of concepts. Its guiding idea is that concepts can be represented geometrically, by means of metrical spaces. While it is generally recognized that many of our concepts are vague, the question of how to model vagueness in the conceptual spaces approach has not been addressed so far, even though the answer is far from straigh...

Introduction 1 1. Bundles 2 1.1. Pullback 2 1.2. Sections 3 1.3. Fiber bundles as fibrations 4 2. Vector bundles 4 2.1. Whitney sum 5 2.2. Sections of vector bundles 6 2.3. Inner products 6 3. Principal Bundles 7 3.1. Morphisms 7 3.2. Sections and trivializations 8 3.3. Associated bundles 9 3.4. Homotopy classification 11 3.5. B as a functor 14 4. Characteristic classes 16 4.1. Line Bundles 16 ...

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Given two Banach function spaces we study the pointwise product space E · F , especially for the case that the pointwise product of their unit balls is again convex. We then give conditions on when the pointwise product E ·M(E,F ) = F , where M(E,F ) denotes the space of multiplication operators from E into F .

In this note, we show that if a Banach space X has a predual, then every bounded linear operator on X with a continuous functional calculus admits a bounded Borel functional calculus. A consequence of this is that on such a Banach space, the classes of finitely spectral and prespectral operators coincide. We also apply this result to give some sufficient conditions for an operator with an absol...

For 0 < p < 1 we give examples of Banach spaces isometrically embedding into Lp but not into any Lr with p < r ≤ 1.

The conceptual spaces approach has emerged as a new and powerful way of thinking about concepts. In earlier work, the present authors have addressed the question of how to model vague concepts in the conceptual spaces framework. That in turn was instrumental in Decock’s and Douven’s account of a graded membership relation in further work. In this paper, we make use of the account of graded memb...

The rapid developments in the field of online threedimensional (3D) virtual worlds have considerable impact on education activities. Therefore, the 3D designers and teachers start to consider the interaction between design and usability of 3D virtual learning spaces as essential tool for educational systems. For the purpose of our research, a virtual learning space was created as a chemistry cl...

This paper introduces the term Open Virtual Worlds and argues that they are ‘unclaimed educational spaces’, which provide a valuable tool for researching pedagogy. Having explored these claims the way in which Teen Second Life® virtual world was used for pedagogical experimentation in the initial phases of the Schome Park Programme is described. Four sets of pedagogical dimensions that emerged ...

Interactive Face Animation Comprehensive Environment (iFACE) is a generalpurpose software framework that encapsulates the functionality of “face multimedia object”. iFACE exposes programming interfaces and provides authoring and scripting tools to design a face object, define its behaviors, and animate it through static or interactive situations. The framework is based on four parameterized spa...