[seminar] SUTRA Seminar Dr. Joshua Feinberg (petak, 21.09.,
12 sati c.t)
Blazenka Melic
melic at hippo.irb.hr
Thu Sep 20 18:01:58 CEST 2007
INSTITUT "Ruder Boskovic"
ZAVOD ZA TEORIJSKU FIZIKU
Bijenicka c. 54, Zagreb, Hrvatska
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SEMINAR TEORIJSKE FIZIKE
(Zajednicki seminari Zavoda za fiziku PMF-a i
Zavoda za teorijsku fiziku IRB-a)
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http://thphys.irb.hr/Seminar/seminar.htm
Joshua Feinberg
Department of Physics, Technion-Israel Institute of Technology, Haifa
Department of Physics, Oranim-University of Haifa, Tivon, Israel
"Does the complex extension of the Riemann equation exhibit shocks?"
Datum: 21. rujna 2007. (petak)
Vrijeme: 12 sati c.t.
Mjesto: IRB, predavaonica I krila
Sazetak:
Recently, there has been some interest in $PT$-invariant complex
extensions of nonlinear equations of fluid dynamics, such as the KdV
equation. I shall briefly review this activity. In this talk I will
focus on the Riemann equation.
The Riemann equation $u_t+uu_x=0$, which describes a one-dimensional
accelerationless perfect fluid, possesses solutions that typically
develop
shocks in a finite time. This equation is $PT$ symmetric.
A one-parameter $PT$-invariant complex extension of this equation
has the form $u_t-iu(iu_x)^\epsilon=0$. In this paper this complex
equation is solved exactly using the method of characteristic strips and
it is shown that for real initial conditions shocks cannot develop
unless $\epsilon$ is an odd integer.
2007-09-13
Voditeljica seminara:
dr. Blazenka Melic (melic at thphys.irb.hr)
More information about the seminar
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