Results 41 to 50 of about 3,693 (146)
Bidual as a weak nonstandard hull
, 2008 We construct the weak nonstandard hull of a normed linear space X from *X (the nonstandard extension of X) using the weak topology on X. The bidual (i.e. the second dual) X" is shown to be isometrically isomorphic to the weak nonstandard hull of X.
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On uniform spaces with invariant nonstandard hulls
Journal of Logic and Analysis, 2014 This paper is about nonstandard topology, in the tradition of Luxemburg [\textit{W.~A.~J.~Luxemburg}, A general theory of monads, in: Appl. Model Theory Algebra, Anal., Probab., Proc. Int. Sympos. Calif. Inst. Technol. 1967, 18--86 (1969; Zbl 0207.52402)].
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Cannabis‐infused foods: Phytonutrients, health, and safe product innovations
Comprehensive Reviews in Food Science and Food Safety, Volume 23, Issue 5, September 2024.Abstract Cannabis‐infused foods are currently on the rise in markets all around the world. Meanwhile, there are concerns over the health implications for consumers. Studies have explored the therapeutic potential and nutritional and economic benefits of cannabis usage.
Eric Fordjour +5 more
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Analytic Nullstellensätze and the model theory of valued fields
Mathematische Nachrichten, Volume 297, Issue 8, Page 2873-2917, August 2024.Abstract We present a uniform framework for establishing Nullstellensätze for power series rings using quantifier elimination results for valued fields. As an application, we obtain Nullstellensätze for p$p$‐adic power series (both formal and convergent) analogous to Rückert's complex and Risler's real Nullstellensatz, as well as a p$p$‐adic analytic ...
Matthias Aschenbrenner, Ahmed Srhir
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Supersymmetric heterotic solutions via non-SU(3) standard embedding
, 2014 A supersymmetric solution to type II supergravity is constructed by superposing two hyperk\"ahlers with torsion metrics. The solution is given by a K\"aler with torsion metric with $SU(3)$ holonomy.
Hinoue, Kazuki +2 more
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Loan‐to‐value limits as a macroprudential policy tool: Developments in theory and practice
Journal of Economic Surveys, Volume 38, Issue 1, Page 232-267, February 2024.Abstract I analyze the development of the loan‐to‐value (LTV) ratio limit for households as a macroprudential policy tool in both theory and practice, by surveying theoretical and empirical literature. I argue that the practical implementation of LTV caps preceded theoretical studies, but research has caught up since the global financial crisis ...
William Gatt
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A robust permutation test for subvector inference in linear regressions
Quantitative Economics, Volume 15, Issue 1, Page 27-87, January 2024.We develop a new permutation test for inference on a subvector of coefficients in linear models. The test is exact when the regressors and the error terms are independent. Then we show that the test is asymptotically of correct level, consistent, and has power against local alternatives when the independence condition is relaxed, under two main ...
Xavier D'Haultfœuille +1 more
wiley +1 more source
Delta Hedging in Financial Engineering: Towards a Model-Free Approach [PDF]
, 2010 Delta hedging, which plays a crucial r\^ole in modern financial engineering, is a tracking control design for a "risk-free" management. We utilize the existence of trends in financial time series (Fliess M., Join C.: A mathematical proof of the existence
Fliess, Michel, Join, Cédric
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A unifying Radon-Nikodým theorem through nonstandard hulls
Illinois Journal of Mathematics, 2005 We present a Radon-Nikodým theorem for vector measures of bounded variation that are absolutely continuous with respect to the Lebesgue measure on the unit interval. Traditional Radon-Nikodým derivatives are Banach space-valued Bochner integrable functions defined on the unit interval or some other measure space.
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Optimal delegation and information transmission under limited awareness
Theoretical Economics, Volume 19, Issue 1, Page 245-284, January 2024.We study the delegation problem between a principal and an agent, who not only has better information about the performance of the available actions but also superior awareness of the set of actions that are actually feasible. We provide conditions under which the agent finds it optimal to leave the principal unaware of relevant options.
Sarah Auster, Nicola Pavoni
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