Keyphrases
Periodic Function
100%
Quadratic Center
43%
Period Annulus
36%
Bifurcation
35%
Bifurcation of Critical Periods
34%
Dulac Time
26%
Vector Field
25%
Abelian Integral
23%
Potential Systems
21%
Critical Periodic Orbit
20%
Dulac Map
20%
Outer Boundary
19%
Differential System
17%
Hamiltonian Systems
17%
Bifurcation Diagram
15%
Hilbert's 16th Problem
15%
Asymptotic Expansion
15%
Planar Polynomials
14%
Isochrones
14%
Chebyshev Property
13%
Isochronous Center
13%
Time Function
13%
Degree Four
11%
Polynomial Hamiltonian Systems
11%
Family Type
11%
Saddle-node
11%
Monotone
10%
Isochronicity
9%
Limit Cycle
9%
Parameter Space
9%
Quadratic Reversible Center
9%
Degenerate Center
9%
Number of Limit Cycles
8%
Monomial
8%
Parameter Plane
8%
Number of Zeros
7%
Open Subset
7%
C(X)
7%
Meromorphic
7%
One-parameter
7%
Asymptotic Development
6%
Stochastic Lotka-Volterra System
6%
Principal Part
6%
Planar Vector Fields
6%
Periodic Orbits
6%
Chebyshev Criterion
5%
Zeros of Polynomials
5%
Generalized Lotka-Volterra
5%
Kuramoto Model
5%
Microscopic Markov Chain Approach
5%
Mathematics
Differential System
46%
Orbit
45%
Vector Field
41%
Polynomial
40%
Hamiltonian Systems
29%
Asymptotic Expansion
27%
Integral
24%
Chebyshev
20%
Parameter Space
19%
Limit Cycle
19%
Differential Equation
17%
Sufficient Condition
16%
Isochrone
16%
Main Result
15%
Parameter Plane
14%
Parameter Family
13%
Open Subset
13%
Critical Point
12%
Asymptotics
11%
Codimension
11%
Lotka-Volterra Model
11%
Hilbert Problem
11%
Nonlinearity
10%
Monomials
9%
Building Block
8%
Saddle Point
8%
Upper Bound
7%
Manifold
5%
Compact Subset
5%
Conjugacy
5%
Mandelbrot Set
5%
Hopf Bifurcation
5%
Generalized Abel Equation
5%
Finite Order
5%
Nonexistence
5%
Return Time
5%
Parameter Theorem
5%
Triangle
5%
Equilibrium Solution
5%
Markov Chain
5%
Wavelength
5%
Hamiltonian Function
5%
