منابع مشابه
1 Twisted K - Theory Old and New
The motivation for this definition is to give in K-theory a satisfactory Thom isomorphism and Poincaré duality pairing which are analogous to the usual ones in cohomology with local coefficients. More precisely, as proved in [K1] (a precursor to twisted K-theory), if V is a real vector bundle on a compact space X with a positive metric, the K-theory of the Thom space of V is isomorphic to a cer...
متن کاملOld World Econometrics and New World Theory
This paper summarizes recent work on the econometrics of identification in rational expectations models by myself and Andreas Beyer. In this work, we discuss the relationship between structure and reduced form in linear rational expectations models and we apply our analysis to a class of new Keynesian models that are frequently used to inform the policy debate. We argue that the identifying ass...
متن کاملTwisted K - Theory Old and New
Twisted K-theory has its origins in the author’s PhD thesis [27] and in a paper with P. Donovan [19]. The objective of this paper is to revisit the subject in the light of new developments inspired by Mathematical Physics. See for instance E. Witten [42], J. Rosenberg [37], C. Laurent-Gentoux, J.-L. Tu, P. Xu [41] and M.F. Atiyah, G. Segal [8], among many authors. We also prove some new results...
متن کاملAppraisal Theory: Old and New Questions
I describe my current thinking on two old questions—the causal role of appraisals and the relationship of appraisal theories to basic emotions theories and constructivist theories, and three (sort of) new questions—the completeness of appraisals, the role of language, and the development of automaticity in emotional responses.
متن کاملConstructing a New Theory From Old Ideas and New Evidence
A central tenet of constructivist models of conceptual development is that children's initial conceptual level constrains how they make sense of new evidence and thus whether exposure to evidence will prompt conceptual change. Yet little experimental evidence directly examines this claim for the case of sustained, fundamental conceptual achievements. The present study combined scaling and exper...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Advances in Mathematics
سال: 1970
ISSN: 0001-8708
DOI: 10.1016/0001-8708(70)90015-0