PDE Geometric Analysis seminar: Difference between revisions
No edit summary |
No edit summary |
||
| Line 19: | Line 19: | ||
|Arshak Petrosyan (Purdue) | |Arshak Petrosyan (Purdue) | ||
|[[#Arshak Petrosyan (Purdue)| | |[[#Arshak Petrosyan (Purdue)| | ||
'' | ''Nonuniqueness in a free boundary problem from combustion'']] | ||
|Misha | |Misha | ||
|- | |- | ||
| Line 66: | Line 66: | ||
===Arshak Petrosyan (Purdue)=== | ===Arshak Petrosyan (Purdue)=== | ||
'' | ''Nonuniqueness in a free boundary problem from combustion'' | ||
We consider a parabolic free boundary problem with a fixed gradient condition | |||
which serves as a simplified model for the propagation of premixed equidiffusional | |||
flames. We give a rigorous justification of an example due to J.L. V ́azquez that | |||
the initial data in the form of two circular humps leads to the nonuniqueness of limit | |||
solutions if the supports of the humps touch at the time of their maximal expansion. | |||
This is a joint work with Aaron Yip. | |||
===Changyou Wang (U. of Kentucky)=== | ===Changyou Wang (U. of Kentucky)=== | ||
''Phase transition for higher dimensional wells'' | ''Phase transition for higher dimensional wells'' | ||
For a potential function $F$ that has two global minimum sets consisting of two compact connected | |||
Riemannian submanifolds in $R^k$, we consider the singular perturbation problem: | Riemannian submanifolds in $R^k$, we consider the singular perturbation problem: | ||
Revision as of 21:01, 17 September 2010
PDE and Geometric Analysis Seminar - Fall 2010
The seminar will be held in room B115 of Van Vleck Hall on Mondays from 3:30pm - 4:30pm
Seminar Schedule
| date | speaker | title | host(s) |
|---|---|---|---|
| Sept 13 | Fausto Ferrari (Bologna) |
Semilinear PDEs and some symmetry properties of stable solutions |
Misha |
| Sept 27 | Arshak Petrosyan (Purdue) | Misha | |
| Oct 7, Thursday, 4 pm, Room: TBA. Special day, time & room. | Changyou Wang (U. of Kentucky) | Misha | |
| Oct 11 | Philippe LeFloch (Paris VI) | Misha | |
| Oct 29 Friday | Irina Mitrea (IMA & U of Virginia) | WiMaW | |
| Nov 8 | Maria Gualdani (UT Austin) | Misha | |
| Date TBA | Mikhail Feldman (UW Madison) | TBA | Local speaker |
| Date TBA | Sigurd Angenent (UW Madison) | TBA | Local speaker |
Abstracts
Fausto Ferrari (Bologna)
Semilinear PDEs and some symmetry properties of stable solutions
I will deal with stable solutions of semilinear elliptic PDE's and some of their symmetry's properties. Moreover, I will introduce some weighted Poincaré inequalities obtained by combining the notion of stable solution with the definition of weak solution.
Arshak Petrosyan (Purdue)
Nonuniqueness in a free boundary problem from combustion
We consider a parabolic free boundary problem with a fixed gradient condition which serves as a simplified model for the propagation of premixed equidiffusional flames. We give a rigorous justification of an example due to J.L. V ́azquez that the initial data in the form of two circular humps leads to the nonuniqueness of limit solutions if the supports of the humps touch at the time of their maximal expansion.
This is a joint work with Aaron Yip.
Changyou Wang (U. of Kentucky)
Phase transition for higher dimensional wells
For a potential function $F$ that has two global minimum sets consisting of two compact connected Riemannian submanifolds in $R^k$, we consider the singular perturbation problem:
Minimizing $\int (|\nabla u|^2+\frac{1}{\epsilon2} F(u))$ under given Dirichlet boundary data.
I will discuss a recent joint work with F.H.Lin and X.B.Pan on the asymptotic, as the parameter $\epsilon$ tends to zero, in terms of the area of minimal hypersurface interfaces, the minimal connecting energy, and the energy of minimizing harmonic maps into the phase manifolds under both Dirichlet and partially free boundary data. Our results in particular addressed the static case of the so-called Keller-Rubinstein-Sternberg problem.
Philippe LeFloch (Paris VI)
TBA
Irina Mitrea
TBA
Maria Gualdani (UT Austin)
TBA