Results 21 to 30 of about 8,059 (263)

Q-Learning for MDPs with General Spaces: Convergence and Near Optimality via Quantization under Weak Continuity

CoRR, 2021
Reinforcement learning algorithms often require finiteness of state and action spaces in Markov decision processes (MDPs) (also called controlled Markov chains) and various efforts have been made in the literature towards the applicability of such algorithms for continuous state and action spaces.
Kara, A. D., Saldı, Naci, Yüksel, S.
openaire   +5 more sources

Weak continuity properties of topologized groups [PDF]

, 2005
summary:We explore (weak) continuity properties of group operations. For this purpose, the Novak number and developability number are applied. It is shown that if $(G, \cdot ,\tau )$ is a regular right (left) semitopological group with $\mathop{{\rm dev}}
Cao, J., Drozdowski, R., Arhangel'skii, A.V., Reznichenko, E.A., Piotrowski, Z.   +4 more
core   +1 more source

Weak solutions of backward stochastic differential equations with continuous generator

Stochastic Processes and their Applications, 2014
We prove the existence of a weak solution to a backward stochastic differential equation (BSDE) $$ Y_t=ξ+\int_t^T f(s,X_s,Y_s,Z_s)\,ds-\int_t^T Z_s\,d\wien_s$$ in a finite-dimensional space, where $f(t,x,y,z)$ is affine with respect to $z$, and satisfies a sublinear growth condition and a continuity condition This solution takes the form of a triplet $(
Bouchemella, Nadira, Raynaud de Fitte, Paul   +1 more
openaire   +3 more sources

Generalized Weak Weyl Relation and Decay of Quantum Dynamics [PDF]

, 2005
Let $H$ be a self-adjoint operator on a Hilbert space $\mathcal{H}, T$ be a symmetric operator on $\mathcal{H}$ and $K(t)$ $(t∈\mathbb{R})$ be a bounded self-adjoint operator on $\mathcal{H}$.
Arai, Asao
core   +1 more source

Dual pairs of sequence spaces

International Journal of Mathematics and Mathematical Sciences, 2001
The paper aims to develop for sequence spaces E a general concept for reconciling certain results, for example inclusion theorems, concerning generalizations of the Köthe-Toeplitz duals E×(×∈{α,β}) combined with dualities (E,G),G⊂E×, and the SAK-property
Johann Boos, Toivo Leiger
doaj   +1 more source

Existence of global weak solutions to some regularized kinetic models for dilute polymers [PDF]

, 2007
Published ...
Sueli, E, Suli, E, Barrett, JW
core   +1 more source

Revisiting Probabilistic Metric Spaces

International Journal of Topology
The field of probabilistic metric spaces has an intrinsic interest based on a blend of ideas drawn from metric space theory and probability theory. The goal of the present paper is to introduce and study new ideas in this field.
Michael D. Rice
doaj   +1 more source

Therapeutic Apheresis for Intravenous Methylprednisolone‐Refractory Neuromyelitis Optica Spectrum Disorder: Clinical and Radiological Outcomes in a Single‐Center Case Series

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Neuromyelitis optica spectrum disorder (NMOSD) is a relapsing autoimmune disease of the central nervous system. High‐dose intravenous methylprednisolone (IVMP) is the standard first‐line therapy for acute attacks, although some patients remain refractory.
Wataru Horiguchi, Daisuke Katagiri, Takeyuki Watadani, Shunichi Matsuda, Hiroshi Kaneko, Noritoshi Arai   +5 more
wiley   +1 more source

Uncertainty quantification and weak approximation of an elliptic inverse problem [PDF]

, 2011
We consider the inverse problem of determining the permeability from the pressure in a Darcy model of flow in a porous medium. Mathematically the problem is to find the diffusion coefficient for a linear uniformly elliptic partial differential equation ...
Worthington, Claire, Robinson, Stewart, Davis, Neil D., Radnor, Zoe, Cooke, Matthew W, Burgess, Nicola, Cooke, Matthew, M. Dashti, Davies, Neil, Dashti, M., A. M. Stuart, Masoumeh Dashti (4463344), Worthington, Claire H, A M Stuart (13396491), Stuart, A. M.   +14 more
core   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source