About a conjecture on quadratic vector fields
β Scribed by Jean Moulin Ollagnier
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 85 KB
- Volume
- 165
- Category
- Article
- ISSN
- 0022-4049
No coin nor oath required. For personal study only.
β¦ Synopsis
The Lotka-Volterra system of autonomous di erential equations consists in three homogeneous polynomial equations of degree 2 in three variables. This system, or the corresponding vector ΓΏeld LV (A; B; C), depends on three non-zero (complex) parameters and may be written as LV (A; B; C) = Vx@x + Vy@y + Vz@z where Vx = x(Cy + z); Vy = y(Az + x); Vz = z(Bx + y):
π SIMILAR VOLUMES
We thank N. I. Vulpe [V], who pointed out the error to us.
The energy E(G) of a graph G is the sum of the absolute values of the eigenvalues of G. An n-vertex graph G is said to be hypoenergetic if E(G) < n. In Gutman et al. (2008) [14] the authors conjectured that there exist n-vertex hypoenergetic trees with maximum degree β = 4 for any n β‘ 2 mod 4, n > 2