On the number of limit cycles which appear with the variation of coefficients from an equilibrium position of focus or center type
Series: American Mathematical Society translations -- no. 100
Published: 1954
Place of publication: Providence
Language: eng
Translated from: rus
Number of pages: 19
Subjects: Differential equations
Notes: Translation of an article from Matematicheskii sbornik, n.s. 30 (72), 1952, p. 181-196.