31 research outputs found
Lie point symmetries and first integrals: the Kowalevsky top
We show how the Lie group analysis method can be used in order to obtain
first integrals of any system of ordinary differential equations.
The method of reduction/increase of order developed by Nucci (J. Math. Phys.
37, 1772-1775 (1996)) is essential. Noether's theorem is neither necessary nor
considered. The most striking example we present is the relationship between
Lie group analysis and the famous first integral of the Kowalevski top.Comment: 23 page
Astrazione causale e contratto autonomo di garanzia
Viene trattato il problema della causalit\ue0 con riguardo alla fattispecie, di creazione sociale e giurisprudenziale, del contratto autonomo di garanzi