Results 31 to 40 of about 774 (145)

The fundamental theorem of asset pricing with and without transaction costs

Mathematical Finance, Volume 35, Issue 2, Page 567-609, April 2025.
Abstract We prove a version of the fundamental theorem of asset pricing (FTAP) in continuous time that is based on the strict no‐arbitrage condition and that is applicable to both frictionless markets and markets with proportional transaction costs. We consider a market with a single risky asset whose ask price process is higher than or equal to its ...
Christoph Kühn
wiley   +1 more source

Bifurcation of limit cycles in a class of piecewise smooth generalized Abel equations with two asymmetric zones

Advanced Nonlinear Studies
This paper studies the number of limit cycles, known as the Smale-Pugh problem, for the generalized Abel equationdxdθ=A(θ)xp+B(θ)xq, $$\frac{\mathrm{d}x}{\mathrm{d}\theta }=A\left(\theta \right){x}^{p}+B\left(\theta \right){x}^{q},$$ where A and B are ...
Liang Haihua, Huang Jianfeng
doaj   +1 more source

Risk Measure Duality Without Structure

Mathematical Finance, EarlyView.
ABSTRACT We study risk measures on vector spaces of random variables which a priori have little structure, such as spaces lacking law invariance or a lattice structure. Ensuring the existence of a tractable dual representation (one which does not contain non‐sigma‐additive measures) is one of the main problems in risk measure theory, and we address it ...
Vasily Melnikov
wiley   +1 more source

Shot‐Based Quantum Encoding: A Data‐Loading Paradigm for Quantum Neural Networks

Advanced Computing, Volume 1, Issue 1, December 2026.
Shot‐based quantum encoding loads classical data without any encoding gates: a learned map turns each datum into a probability vector that dictates how many measurement shots start in each basis state, preparing a mixed state that a shallow variational circuit processes as a quantum perceptron layer.
Basil Kyriacou, Viktoria Patapovich, Maniraman Periyasamy, Alexey Melnikov   +3 more
wiley   +1 more source

The diagnostics and laser infrastructure at the Soft X‐ray Port of the European XFEL

Journal of Synchrotron Radiation, Volume 33, Issue 5, Page 1531-1541, September 2026.
The diagnostics and laser infrastructure of the Soft X‐ray Port (SXP) at the European X‐ray Free Electron Laser are presented.The diagnostics and laser infrastructure of the Soft X‐ray Port (SXP) at the European X‐ray Free Electron Laser are presented.
Patrik Grychtol, Vahagn Vardanyan, Pranav Bhardwaj, Michael Heber, David Doblas-Jimenez, Ekaterina Tikhodeeva, Serguei Molodtsov, Manuel Izquierdo   +7 more
wiley   +1 more source

Virtual commissioning of the Korea Light Source Hard X‐ray Nanoprobe beamline with multilingual natural language control

Journal of Synchrotron Radiation, Volume 33, Issue 5, Page 1310-1325, September 2026.
A pre‐installation virtual commissioning platform for the Korea Light Source ID10 hard X‐ray nanoprobe couples browser‐based Monte Carlo ray tracing, EPICS/Bluesky control and a multilingual natural‐language agent (98.2% accuracy in Korean, English and Japanese) under a zero‐change hardware transition principle, producing commissioning design inputs ...
Minho Seo, Hyeong-joo Choi, Daseul Ham, Changwan Ha, Yong-Hyun Kim, Changhui Lee, Jun Lim, Ki-jeong Kim, In-hui Hwang, Jaeyong Shin   +9 more
wiley   +1 more source

Red to Green: A Lipid Biomarker Record of Tonian‐Ediacaran Algae in Siberia

Geobiology, Volume 24, Issue 5, September/October 2026.
ABSTRACT Multiple lines of evidence point to a major diversification of Eukarya in the late Tonian period, ca. 800–720 Ma ago. Regular steranes, lipid biomarkers primarily sourced from eukaryotes, are first unambiguously reported from multiple sites. Here, we present lipid biomarker stratigraphic records from two drill‐cores from the Lena‐Anabar Basin ...
Adriana I. Rizzo, Andrey Bekker, Anton B. Kuznetsov, Victoria B. Ershova, Yijun Xiong, Karl E. Karlstrom, Simon W. Poulton, Gordon D. Love   +7 more
wiley   +1 more source

Spherically symmetric geometrodynamics in Jordan and Einstein frames

European Physical Journal C: Particles and Fields
Spherically symmetric geometrodynamics is studied for scalar–tensor theory and Einstein General Relativity minimally coupled to a scalar field. We discussed the importance of boundary terms for non-compact space-like foliations and derived the equations ...
Matteo Galaverni, Gabriele Gionti
doaj   +1 more source

Seismic Tremor as a Precursor to Hydrothermal Explosions Near Mutnovsky Volcano (Kamchatka)

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Mutnovsky Volcano, ∼70 km SW of Petropavlovsk‐Kamchatsky, exhibits persistent degassing, hosts active hydrothermal springs and the Mutnovsky Geothermal Power Plant (MGPP) on its slopes. Using the network covariance matrix approach, we analyzed seismic data recorded in 2023–2024 by 15 seismic stations operating around Mutnovsky Volcano.
Y. Berezhnev, N. Belovezhets, N. M. Shapiro, S. Abramenkov, I. Abkadyrov, S. Yaskevich, D. Chebrov, I. Koulakov   +7 more
wiley   +1 more source

Exponential dichotomies, heteroclinic orbits, and Melnikov functions

Journal of Differential Equations, 1990
The authors consider an n-dimensional perturbed system (*) \(dz/dt=g(z)+h(t,z,\epsilon),\) where the perturbation term h(t,z,\(\epsilon\)) is bounded, \(\epsilon\) being a multidimensional parameter, and they give, using the method of Lyapunov-Schmidt, a sufficient condition for the existence of a bounded solution of (*) as the solvability condition of
Battelli, Flaviano, Lazzari, Claudio
openaire   +1 more source