Results 121 to 130 of about 112,001 (232)
Kunneth formula for Hessian manifolds
We study Dolbeault--Koszul cohomology $H^{p,q}(M)$ of flat affine manifolds. We proove a Künneth formula \[ H^{p,q}(M\times N) \cong \bigoplus_{i,j} H^{i,j}(M)\otimes H^{p-i,q-j}(N) \] for flat affine manifolds $M,N$ with at least one compact. For compact manifolds we also give a proof via Hodge theory on flat affine manifolds, analogous to the ...
openaire +2 more sources
Parametric Time‐Variation in the Unconditional Volatility: Estimation and Inference
Journal of Time Series Analysis, EarlyView.ABSTRACT We propose modeling time‐variation in the unconditional volatility by augmenting the standard GARCH model by a deterministic time‐varying intercept. The model, called the additive time‐varying (ATV‐)GARCH model, can be interpreted as a reduced form of a model including covariates and can be derived from a multiplicative decomposition of ...
Niklas Ahlgren +2 more
wiley +1 more source
Reinforcement Learning for Jump‐Diffusions, With Financial Applications
Mathematical Finance, EarlyView.ABSTRACT We study continuous‐time reinforcement learning (RL) for stochastic control in which system dynamics are governed by jump‐diffusion processes. We formulate an entropy‐regularized exploratory control problem with stochastic policies to capture the exploration–exploitation balance essential for RL.
Xuefeng Gao, Lingfei Li, Xun Yu Zhou
wiley +1 more source
Adaptive Importance Sampling Estimation of an Open Economy Model With Fiscal Policy
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT We propose and estimate an open economy general equilibrium model that includes international trade between Canada and the United States. We estimate our model using a new adaptive methodology based on the mixture of student's t$$ t $$ by Importance Sampling weighted Expectation–Maximisation (MitISEM).
Stefano Grassi +2 more
wiley +1 more source
Viscosity solution to complex Hessian quotient equations
In this paper, we prove the existence of viscosity solutions to complex Hessian equations on compact Hermitian manifolds, assuming the existence of a strict subsolution in the viscosity sense.
Xu, Yulun, Cheng, Jingrui
core +1 more source
Subgroup separability, knot groups, and graph manifolds
, 2000 This paper answers a question of Burns, Karrass and Solitar by giving examples of knot and link groups which are not subgroup-separable. For instance, it is shown that the fundamental group of the square knot complement is not subgroup separable.
Wise, Daniel T. +3 more
core
The Journal of Physiology, EarlyView.Abstract figure legend Experimental workflow of the dual‐camera light‐sheet microscope (dual‐mesoSPIM) pipeline. Intact adult mouse hearts undergo CUBIC‐based delipidation and refractive‐index matching, rendering the whole organ optically transparent (left).
Francesco Giardini +12 more
wiley +1 more source
Subgroup separability, knot groups, and graph manifolds
, 2001 This paper answers a question of Burns, Karrass and Solitar by giving examples of knot and link groups which are not subgroup-separable. For instance, it is shown that the fundamental group of the square knot complement is not subgroup separable.
Wise, Daniel T., Niblo, Graham A.
core
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.ABSTRACT Recent results have shown that domain‐uniform stabilizability and detectability imply spatial exponential decay of perturbations in optimally controlled hyperbolic PDEs on one‐dimensional domains. This domain‐uniform stabilizability and detectability can be achieved only if the control domain is distributed over the whole spatial domain such ...
Benedikt Oppeneiger
wiley +1 more source
Topics on Hessian type equations [PDF]
We study some selected topics on Hessian type equations. In the first chapter, our goal to generalize the quantitative version of the constant rank theorem by Sz\'{e}kelyhidi-Weinkove onto Hermitian manifolds and the complex coordinate space.
Tsai, Yi-Lin
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