Results 1 to 10 of about 471,233 (143)

A note on contracts on quadratic variation. [PDF]

open access: yesPLoS ONE, 2017
Given a Black stochastic volatility model for a future F, and a function g, we show that the price of [Formula: see text] can be represented by portfolios of put and call options. This generalizes the classical representation result for the variance swap.
Carl Lindberg
doaj   +2 more sources

A quadratic paradigm describes the relationship between phenotype severity and variation [PDF]

open access: yesNature Communications
In 1942 Waddington observed that phenotype variation among mutant animals is greater than in wild types. Here we update this observation to depict unexpected relationships between phenotype severity and variation.
Abigail Mumme-Monheit   +8 more
doaj   +2 more sources

A Maximum Principle for Controlled Time-Symmetric Forward-Backward Doubly Stochastic Differential Equation with Initial-Terminal Sate Constraints

open access: yesAbstract and Applied Analysis, 2012
We study the optimal control problem of a controlled time-symmetric forward-backward doubly stochastic differential equation with initial-terminal state constraints. Applying the terminal perturbation method and Ekeland’s variation principle, a necessary
Shaolin Ji, Qingmeng Wei, Xiumin Zhang
doaj   +3 more sources

IMPLEMENTATION OF QUADRATIC AXIAL TRIAL FUNCTIONS IN THE HIGH-FIDELITY TRANSPORT CODE PROTEUS-MOC [PDF]

open access: yesEPJ Web of Conferences, 2021
PROTEUS-MOC is a pin-resolved high-fidelity transport code, in which the axial variation of angular flux is represented in terms of orthogonal polynomials.
Zhang Guangchun, Yang Won Sik
doaj   +1 more source

BDG inequalities and their applications for model-free continuous price paths with instant enforcement

open access: yesModern Stochastics: Theory and Applications, 2023
Shafer and Vovk introduce in their book [8] the notion of instant enforcement and instantly blockable properties. However, they do not associate these notions with any outer measure, unlike what Vovk did in the case of sets of “typical” price paths.
Rafał Marcin Łochowski
doaj   +1 more source

New Studies of the Aberrant Alterations in Fibrillin-1 Methylation During Colorectal Cancer Development

open access: yesFrontiers in Oncology, 2022
BackgroundFibrillin-1 (FBN1) methylation risk from control to colorectal cancer (CRC), the variation regularities of FBN1 methylation, and DNA methyltransferase (DNMT) catalyzed with FBN1 methylation had not been reported yet; these were all studied in ...
Ling Lv   +5 more
doaj   +1 more source

Modelling, design and analysis of three controllers based on LQR formulation for a non-linear hydraulic uniaxial seismic shake table [PDF]

open access: yesE3S Web of Conferences, 2019
This study presents the modelling, design and analysis of three controllers applied to the non-linear model of a hydraulic uniaxial seismic shake table. Firstly, the system’s non-linear model is constructed based on the dynamic and mathematical analysis ...
Sarmiento José Luis   +1 more
doaj   +1 more source

Simultaneous estimation of log-normal coefficients of variation: Shrinkage and pretest strategies

open access: yesMethodsX, 2023
In this paper, we consider the problem of estimating the log-normal coefficients of variation when multiple samples from log-normal populations with unequal variances are combined.
Mahmoud Aldeni   +3 more
doaj   +1 more source

Estimating the Hurst index of the solution of a stochastic integral equation

open access: yesLietuvos Matematikos Rinkinys, 2009
Let X(t) be a solution of a stochastic integral equation driven by fractional Brownian motion BH and let V2n (X, 2) = \sumn-1 k=1(\delta k2X)2 be the second order quadratic variation, where \delta k2X = X (k+1/N) − 2X (k/ n) +X (k−1/n).
Kęstutis Kubilius, Dmitrij Melichov
doaj   +1 more source

On estimation of the Hurst index of solutions of stochastic integral equations

open access: yesLietuvos Matematikos Rinkinys, 2008
Let X be a solution of a stochasti Let X be a solution of a stochastic integral equation driven by a fractional Brownian motion BH and let Vn(X, 2) = \sumn k=1(\DeltakX)2, where \DeltakX = X( k+1/n ) - X(k/n ).
Kęstutis Kubilius, Dmitrij Melichov
doaj   +1 more source

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