Four limit cycles in quadratic two-dimensional systems with a perturbed first-order weak focus

Doklady Mathematics

Volumn 81, Issue 2, 2010, Pages 248-250

  Leonov, G A ^a  

^a ST PETERSBURG STATE UNIVERSITY   (Russian Federation)

Author keywords

[No Author keywords available]

Indexed keywords

APPROXIMATION SOLUTION; CONSTANT COEFFICIENTS; FIRST-ORDER; HALF-PLANES; INITIAL VALUES; LIMIT CYCLE; RIGHT AND LEFT; SECOND-ORDER EQUATION; SINGULAR POINTS; SMALL PERTURBATIONS; STRAIGHT LINES; TWO-DIMENSIONAL SYSTEMS;

TWO DIMENSIONAL;

DELTA SIGMA MODULATION;

EID: 77954883568     PISSN: 10645624     EISSN: None     Source Type: Journal    
DOI: 10.1134/S1064562410020237     Document Type: Article

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