Results 11 to 20 of about 1,323,976 (332)

A parabolic-hyperbolic free boundary problem modeling tumor growth with drug application

open access: greenElectronic Journal of Differential Equations, 2010
In this article, we study a free boundary problem modeling the growth of tumors with drug application. The model consists of two nonlinear second-order parabolic equations describing the diffusion of nutrient and drug concentration, and three ...
Ji-Hong Zhao
doaj   +1 more source

Boundary-value problem with free boundary: zirconium alloy hydrogenation

open access: yesTransactions of the Karelian Research Centre of the Russian Academy of Sciences, 2016
One of the most important requirements for the reactor’s active zone materials (made of zirconium alloys) is low hydrogen absorptivity since hydrogen embrittlement may cause zirconium cladding damage.
Yury Zaika, Natalia Rodchenkova
doaj   +1 more source

Discounted Optimal Stopping of a Brownian Bridge, with Application to American Options under Pinning

open access: yesMathematics, 2020
Mathematically, the execution of an American-style financial derivative is commonly reduced to solving an optimal stopping problem. Breaking the general assumption that the knowledge of the holder is restricted to the price history of the underlying ...
Bernardo D’Auria   +2 more
doaj   +1 more source

On the Optimal Control of the Free Boundary Problems for the Second Order Parabolic Equations. I.Well-posedness and Convergence of the Method of Lines [PDF]

open access: yes, 2012
We develop a new variational formulation of the inverse Stefan problem, where information on the heat flux on the fixed boundary is missing and must be found along with the temperature and free boundary.
Mezzan, Youness, Tber, Moulay Hicham
core   +4 more sources

Some infinite free boundary problems [PDF]

open access: yesTransactions of the American Mathematical Society, 1979
Let Γ \Gamma be the boundary of an unbounded simply connected region D \mathcal {D} , and let C ( Γ ) \mathcal {C}(\Gamma ) denote the family of all simply connected regions Δ ⊂ D \Delta ...
Tepper, David E., Wildenberg, Gerald
openaire   +2 more sources

On a price formation free boundary model by Lasry & Lions: The Neumann problem [PDF]

open access: yes, 2011
We discuss local and global existence and uniqueness for the price formation free boundary model with homogeneous Neumann boundary conditions introduced by Lasry & Lions in 2007.
Caffarelli, Luis A.   +2 more
core   +3 more sources

A Nonlocal Free Boundary Problem [PDF]

open access: yesSIAM Journal on Mathematical Analysis, 2015
Given~$s, \in(0,1)$ and a bounded domain~$ \subset\R^n$, we consider the following minimization problem of $s$-Dirichlet plus $ $-perimeter type $$ [u]_{ H^s(\R^{2n}\setminus( ^c)^2) } + \Per_ \left(\{u>0\}, \right), $$ where~$[ \cdot]_{H^s}$ is the fractional Gagliardo seminorm and $\Per_ $ is the fractional perimeter.
S. Dipierro, O. Savin, E. Valdinoci
openaire   +5 more sources

On a free boundary problem and minimal surfaces [PDF]

open access: yes, 2017
From minimal surfaces such as Simons' cone and catenoids, using refined Lyapunov-Schmidt reduction method, we construct new solutions for a free boundary problem whose free boundary has two components.
Liu, Yong, Wang, Kelei, Wei, Juncheng
core   +2 more sources

A free boundary focusing problem [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
We consider a one-dimensional free boundary problem arising in combustion theory and establish that all solutions are asymptotically equal to a similarity solution which vanishes in a finite time.
Hilhorst, Danielle, Hulshof, Josephus
openaire   +2 more sources

An iterative method for solving a PDE with free boundary arising from pricing corporate bond with credit rating migration

open access: yesAIMS Mathematics, 2023
In this paper an iterative method is proposed to solve a partial differential equation (PDE) with free boundary arising from pricing corporate bond with credit grade migration risk.
Zhongdi Cen   +3 more
doaj   +1 more source

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