Results 11 to 20 of about 5,309,525 (360)
Saddle-Point Dynamics: Conditions for Asymptotic Stability of Saddle Points [PDF]
SIAM Journal on Control and Optimization, 2017 26 pages, To appear in SIAM Journal on Control and ...
Jorge E. Cortes +2 more
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Nonperturbative Saddle Point for the Effective Action of Disordered and Interacting Electrons in 2D [PDF]
, 2000 We find a non-perturbative saddle-point solution for the non-linear sigma model proposed by Finkelstein for interacting and disordered electronic systems.
Claudio Chamon, Eduardo R. Mucciolo
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On Accelerated Methods for Saddle-Point Problems with Composite Structure [PDF]
Computer Research and Modeling, 2021 We consider strongly-convex-strongly-concave saddle-point problems with general non-bilinear objective and different condition numbers with respect to the primal and the dual variables. First, we consider such problems with smooth composite terms, one of
Vladislav Tominin +5 more
semanticscholar +1 more source
Refined saddle-point preconditioners for discretized Stokes problems. [PDF]
Numer Math (Heidelb), 2018 This paper is concerned with the implementation of efficient solution algorithms for elliptic problems with constraints. We establish theory which shows that including a simple scaling within well-established block diagonal preconditioners for Stokes ...
Pearson JW, Pestana J, Silvester DJ.
europepmc +4 more sources
Cancer Medicine, 2023 Background Patients with muscle‐invasive bladder cancer (MIBC) constitute a heterogenous group in terms of patient and tumour characteristics (‘case‐mix’) and prognosis.
Christel Häggström +4 more
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Journal of NeuroEngineering and Rehabilitation, 2021 Introduction After a stroke, a wide range of deficits can occur with varying onset latencies. As a result, assessing impairment and recovery are enormous challenges in neurorehabilitation. Although several clinical scales are generally accepted, they are
Belén Rubio Ballester +4 more
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Applied Sciences, 2021 Given the mutual information of finite-alphabet inputs cannot be calculated concisely and accurately over fading channels, this paper proposes a new method to calculate the mutual information.
Yuyu Liu, Jinbao Zhang, Dan Zhang
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Accelerated Stochastic Algorithms for Convex-Concave Saddle-Point Problems
Mathematics of Operations Research, 2021 We develop stochastic first-order primal-dual algorithms to solve a class of convex-concave saddle-point problems. When the saddle function is strongly convex in the primal variable, we develop the first stochastic restart scheme for this problem.
Renbo Zhao
semanticscholar +1 more source
Saddle-point scrambling without thermalization
Physical Review A, 2021 Out-of-time-order correlators (OTOCs) have proven to be a useful tool for studying thermalization in quantum systems. In particular, the exponential growth of OTOCS, or scrambling, is sometimes taken as an indicator of chaos in quantum systems, despite ...
R. Kidd, A. Safavi-Naini, J. Corney
semanticscholar +1 more source
Distributed saddle point problems: lower bounds, near-optimal and robust algorithms* [PDF]
Optimization Methods and Software, 2020 This paper focuses on the distributed optimization of stochastic saddle point problems. The first part of the paper is devoted to lower bounds for the centralized and decentralized distributed methods for smooth (strongly) convex-(strongly) concave ...
Aleksandr Beznosikov +2 more
semanticscholar +1 more source