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UID:20251122T111403EST-8884hRFfkM@132.216.98.100
DTSTAMP:20251122T161403Z
DESCRIPTION:Lie group classification of first-order delay ordinary differen
 tial equations.\n\nA group classification of first-order delay ordinary di
 fferential equation (DODE) accompanied by an equation for the delay parame
 ter (delay relation) is presented. A subset of such systems (DODS) which c
 onsists of a linear DODEs and solution independent delay relations have in
 finite-dimensional symmetry algebras\, as do nonlinear ones that are linea
 rizable by an invertible transformation of variables. Genuinely nonlinear 
 DODS have symmetry algebras of dimension n\, 0 ≤ n ≤ 3. It is shown how ex
 act analytical solutions of invariant DODS can be obtained using symmetry 
 reduction. This is joint work with Vladimir A. Dorodnitsyn\, Roman Kozlov\
 , and Sergey V. Meleshko.\n
DTSTART:20180130T203000Z
DTEND:20180130T203000Z
LOCATION:Room 4336\, CA\, Pav. André-Aisenstadt\, 2920\, ch. de la Tour
SUMMARY:Pavel Winternitz\, Université de Montréal\, Centre de Recherches Ma
 thématiques
URL:/mathstat/channels/event/pavel-winternitz-universi
 te-de-montreal-centre-de-recherches-mathematiques-284246
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