Results 41 to 50 of about 300,139 (276)

Improving the adversarial transferability with relational graphs ensemble adversarial attack

Frontiers in Neuroscience, 2023
In transferable black-box attacks, adversarial samples remain adversarial across multiple models and are more likely to attack unknown models. From this view, acquiring and exploiting multiple models is the key to improving transferability.
Jiatian Pi, Chaoyang Luo, Fen Xia, Ning Jiang, Haiying Wu, Zhiyou Wu   +5 more
doaj   +1 more source

Re-examining the moderating role of ICT in the nexus between financial development and banking efficiency: evidence from Africa

Cogent Economics & Finance
Studies on the tripartite nexuses among information and communication technology (ICT), financial development (FD), and banking sector efficiency have largely produced mixed findings. More importantly, how countries’ levels of ICT advancement moderate FD-
Emmanuel Issifu Fuseini, Muazu Ibrahim, Ibrahim Osman Adam, Xuan Vinh Vo   +3 more
doaj   +1 more source

Nonlinear Parabolic Equations arising in Mathematical Finance

, 2017
This survey paper is focused on qualitative and numerical analyses of fully nonlinear partial differential equations of parabolic type arising in financial mathematics.
A. Tourin, B. Bank, B. Düring, C.G. Averbuj, D. Ševčovič, D. Ševčovič, D.P. Bertsekas, G. Barles, J. Ankudinova, J.H. Witte, K. Muthuraman, L.A. Bordag, M. Avellaneda, M. Hamala, M. Jandačka, M. Koleva, M. Kratka, M. Musiela, M.C. Crandall, M.C. Mariani, M.N. Koleva, N. Ishimura, N. Ishimura, P. Amster, P. Schönbucher, Q.S. Song, R. Abe, R. Company, R. Frey, S. Kilianová, S. Kilianová, S. Nayak, S. Zhou, T. Hoggard, T. Zariphopoulou, W. Liao, W.H. Fleming, Y. Huang, Y.K. Kwok, Z. Macová   +39 more
core   +1 more source

Sticky processes, local and true martingales [PDF]

, 2017
We prove that for a so-called sticky process $S$ there exists an equivalent probability $Q$ and a $Q$-martingale $\tilde{S}$ that is arbitrarily close to $S$ in $L^p(Q)$ norm.
Rásonyi, Miklós, Sayit, Hasanjan
core   +2 more sources

Global existence of classical solutions for two-dimensional isentropic compressible Navier–Stokes equations with small initial mass

Advances in Difference Equations, 2020
In this paper, we consider the initial-boundary value problem of two-dimensional isentropic compressible Navier–Stokes equations with vacuum on the square domain.
Wei Li, Zhaoyang Shang, Fuquan Tang
doaj   +1 more source

Affine processes on positive semidefinite matrices

, 2011
This article provides the mathematical foundation for stochastically continuous affine processes on the cone of positive semidefinite symmetric matrices.
Cuchiero, Christa, Filipović, Damir, Mayerhofer, Eberhard, Teichmann, Josef   +3 more
core   +2 more sources

Hitting time for Bessel processes - walk on moving spheres algorithm (WoMS) [PDF]

, 2013
In this article we investigate the hitting time of some given boundaries for Bessel processes. The main motivation comes from mathematical finance when dealing with volatility models, but the results can also be used in optimal control problems.
Deaconu, Madalina, Herrmann, Samuel
core   +5 more sources

The Role of Hellinger Processes in Mathematical Finance

Entropy, 2001
This paper illustrates the natural role that Hellinger processes can play in solving problems from ¯nance. We propose an extension of the concept of Hellinger process applicable to entropy distance and f-divergence distances, where f is a convex ...
T. R. Hurd, T. Choulli
doaj   +1 more source

Chameleon sequences reveal structural effects in proteins representing micelle‐like distribution of hydrophobicity

FEBS Open Bio, EarlyView.
Amino acids sequence of two different proteins with the same sequence (chameleon sequence—black boxes) represent in 3D structure of the proteins different secondary structures: HHHH—helical and BBB—Beta‐structural. The chains folded in water environment adopt different III‐order structures in which the chameleon fragments appear to adopt similar status
Irena Roterman, Katarzyna Stapor, Leszek Konieczny, Krzysztof Gądek, Piotr Nowakowski   +4 more
wiley   +1 more source

Global existence and exponential decay of strong solutions for the three-dimensional Boussinesq equations

Journal of Inequalities and Applications, 2020
In this paper, we consider the global existence of strong solutions to the three-dimensional Boussinesq equations on the smooth bounded domain Ω. Based on the blow-up criterion and uniform estimates, we prove that the strong solution exists globally in ...
Zhaoyang Shang, Fuquan Tang
doaj   +1 more source