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Differential equations with eigenvalue in boundary conditions
Váša, Ondřej ; Kaplický, Petr (advisor) ; Pokorný, Milan (referee)
The goal of this thesis was to study Stokes problem with eigenvalue in bound- ary condition. We were in particular interested in determining the asymptotic be- haviour of the sequence of eigenvalues. We approached this problem by modifying techniques used in several papers studying asymptotic behaviour of eigenvalues in boundary condition for Steklov problem and we wanted to conclude similar re- sults. Firstly, we introduced some theoretical results yielding that the eigenvalue sequence of the problem is corresponding to an eigenvalue sequence of a certain compact and self-adjoint operator. Next, we explicitly calculated precise asymp- totic behaviour of eigenvalues of auxiliary problems on simple domains, however, due to technical difficulties, we were only able to do in two and three dimensions. Finally, by using Min-max Theorem, we managed to get estimates of eigenvalues of the original problem on any bounded C2 domain by eigenvalues of considered auxiliary problems and thus by applying previous results, we managed to prove the desired asymptotic behaviour. 1
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Effect of inhibitory neuron subtypes on neural population dynamics
Habart, Daniel ; Korvasová, Karolína (advisor) ; Kaplický, Petr (referee)
Canonical models of neural circuits rarely differentiate between inhibitory population subtypes. Due to the recent development of optogenetic techniques, the effect of distinct inhibitory classes may now be analysed. This thesis adapts a neural population model of the mouse visual cortex and analyses the stability of equilibria with overall connectivity of the network as a bifurcation parameter. A stability result for small values of the parameter is obtained. 1
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Weak formulation of equations describing fluid flows
Dostalík, Mark ; Pokorný, Milan (advisor) ; Kaplický, Petr (referee)
The standard way of deriving the weak formulation of balance equations of continuum mechanics is derived from their localized form, and thus requires differentiability of functions involved in the corresponding balance law. However, the existence of classical solutions of these equations is often not known. It would be suitable to find a transition to the weak formulation of balance laws without the need of their differential form. The aim of this work is to show that the initial integral form of balance equations of continuum mechanics, provided relatively weak assumptions, directly implies their weak formulation, and thus that the weak solution is for these equations a more natural notion than the classical solution is.
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Mathematical Models for Biology
Hruška, Zdeněk ; Kaplický, Petr (advisor) ; Pražák, Dalibor (referee)
Na/.ev pracc: Matematieke modcly v biologii Autor: Zdenek Hruska Katedra: Vedoucf bakalafskc pracc: Mgr. Pctr Kaplicky, Ph.D. e-mail vcdouciho: kaplickyfV/Jkarlin.mff.cuni.cz Abstrakt: Modelovani epidcmii bylo prvnfm / ninoha pfipadu. kdy matematika vstoupila na pole biologic a mediciny. Infckcni cpidemicke ncmoci provazcjf lidstvo od samych pocatku historic a dodnes jsou vclmi zava/nym tcmatem nejen lekafskc vcdy. Ncktere z techto modelu be za velmi specifickych pfedpokladu popsat pomoci soustav obecne nclinearnich diferencialnich rovnic a vysetfovat jcjich kvalitativni vlastnosti jako jc jcjich existence, jednoznacnost a stabilita jcjich feseni. Nektcrc z techto ryzc matematickych vlastnosli systcmu jsou pak velmi blizke vlastnostcm populace realnclio svcta - podstatou modelu je prolo co nejvicc se pfiblizit parametrum skutccnosti, nebol" l/e z nej nejen pro lekafskou praxi vyefst cenne infonnacc. Pfi modelovani cpidcmickych proeesu tedy neni dulezite jen porozumet podslate chorob, ale take pomoci urcit odpovi'dajiei opatfcnf vcctnc oekovaci strategic. Klfcova slova: diferencialni rovnicc, soustavy, biologic Title: Mathematical models in biology Author: /denek Hruska Department: Supervisor: Mgr. Petr Kaplicky, Ph.D. Supervisor's e-mail: kaplickyCoJkarlin.mff.cuni.cz Abstract: The modelling of epidemics...
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