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Rational Constants of Generic LV Derivations and of Monomial Derivations

Zieliński J.

Bulletin of the Polish Academy of Sciences. Mathematics

2013

Vol. 61, no 3-4

201--208

We describe the fields of rational constants of generic four-variable Lotka–Volterra derivations. Thus, we determine all rational first integrals of the corresponding systems of differential equations. Such systems play a role in population biology, laser physics and plasma physics. They are also an important part of derivation theory, since they are factorizable derivations. Moreover, we determine the fields of rational constants of a class of monomial derivations.