Browsing by Subject "Evolution equations"
Now showing items 1-7 of 7
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Article
Conservation laws and hierarchies of potential symmetries for certain diffusion equations
(2009)We show that the so-called hidden potential symmetries considered in a recent paper [M.L. Gandarias, New potential symmetries for some evolution equations, Physica A 387 (2008) 2234-2242] are ordinary potential symmetries ...
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Article
Continuum model for the phase behavior, microstructure, and rheology of unentangled polymer nanocomposite melts
(2014)We introduce a continuum model for polymer melts filled with nanoparticles capable of describing in a unified and self-consistent way their microstructure, phase behavior, and rheology in both the linear and nonlinear ...
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Article
Differential invariants for third-order evolution equations
(2015)We consider a general class of third order evolution equations. We construct differential invariants with the employment of the infinitesimal method that using equivalence groups. We use the differential invariants to ...
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Doctoral Thesis Open Access
Group analysis of systems of evolution equations
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2018-02-07)Στις μέρες μας, ένα από τα πιο σημαντικά εργαλεία για την επίλυση των Διαφορικών Εξισώσεων είναι η εφαρμογή των μεθόδων των συμμετριών του Lie. Λύσεις μιας μη-γραμμικής Μερικής Διαφορικής Εξίσωσης (ΜΔΕ) μπορούν να ...
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Article
Hodograph-type transformations
(2003)We consider second-order evolution equations of the form ut = F1(u,ux)uxx+F2(u,ux) and third order of the form ut = F1(u,ux)u xxx+F2(u,ux,uxx). For each of these equations we construct point transformations which relate ...
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Conference Object
Optimized interpolations and nonlinearity in numerical studies of woodwind instruments
(2005)We study the impedance spectra of woodwind instruments with arbitrary axisymmetric geometry. We perform piecewise interpolations of the instruments' profile, using interpolating functions amenable to analytic solutions of ...
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Doctoral Thesis Open Access
Symmetry methods for higher-order evolution equations
(Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2013-05)Οι μεθόδοι συμμετριων Lie ίσως να αποτελούν το πιο δυνατό διαθέσιμο εργαλείο στην επίλυση μη-γραμμικών μερικών διαφορικών εξισώσεων. Με κίνητρο τα γνωστά αποτελέσματα της δεύτερης τάξης μη-γραμμικής εξίσωσης της ...