-
1
-
-
0000429762
-
A concrete example of the existence of four limit cycles for plane quadratic systems
-
Shi Songling, A concrete example of the existence of four limit cycles for plane quadratic systems, Sci. China Ser. 11 (1979), 1051-1056.
-
(1979)
Sci. China Ser
, vol.11
, pp. 1051-1056
-
-
Shi, S.1
-
2
-
-
0003588118
-
-
American Math. Society, Providence, R.I
-
Ye Yangqian et al., Theory of Limit Cycle, Translation of Math. Monographs 66, American Math. Society, Providence, R.I., 1986.
-
(1986)
Theory of Limit Cycle, Translation of Math. Monographs
, vol.66
-
-
Ye, Y.1
-
3
-
-
0004051023
-
-
(in Chinese); Modem Math. Basic Series, Science Press, Beijing
-
Zhang Zhifen, et al., Qualitative Theory of Differential Equation (in Chinese); Modem Math. Basic Series, Science Press, Beijing, 1985.
-
(1985)
Qualitative Theory of Differential Equation
-
-
Zhifen, Z.1
-
4
-
-
4744366643
-
On the concentrative distribution and uniqueness of limit cycles for a quadratic system, Dynamical systems
-
Math. Tianjin China, Sept, 1990-1991, World Sci. Pallco. Ptc. Ltd. Singapore
-
Zhang Pingguang, On the concentrative distribution and uniqueness of limit cycles for a quadratic system, Dynamical systems, Proc. Prog. Nanki Inst, Math. Tianjin China, Sept, 1990-1991, World Sci. Pallco. Ptc. Ltd. Singapore 4 (1993), 297-310.
-
(1993)
Proc. Prog. Nanki Inst
, vol.4
, pp. 297-310
-
-
Pingguang, Z.1
-
5
-
-
84896893281
-
On the concentrative distribution and number of limit cycles for a quadratic system (in Chinese)
-
Zhang Pingguang, On the concentrative distribution and number of limit cycles for a quadratic system (in Chinese), Appl. Math. J. Chinese Univ 13A (1998), 1-12.
-
(1998)
Appl. Math. J. Chinese Univ
, vol.13 A
, pp. 1-12
-
-
Pingguang, Z.1
-
6
-
-
0347986605
-
Quadratic systems with two foci (in Chinese)
-
Zhang Pingguang, Quadratic systems with two foci (in Chinese), Appl. Math. J. Chinese Univ 14A (1999), 247-253.
-
(1999)
Appl. Math. J. Chinese Univ
, vol.14 A
, pp. 247-253
-
-
Pingguang, Z.1
-
7
-
-
1842833153
-
On the distribution and number of limit cycles for quadratic systems with two foci (in Chinese)
-
Zhang Pingguang, On the distribution and number of limit cycles for quadratic systems with two foci (in Chinese), Acta Math. Sinica 44 (2001), no. 1, 37-44.
-
(2001)
Acta Math. Sinica
, vol.44
, Issue.1
, pp. 37-44
-
-
Pingguang, Z.1
-
8
-
-
84978987147
-
A quadratic system with weak focus and strong focus
-
Zhang Pingguang and Li Wenhua, A quadratic system with weak focus and strong focus, Ann. Differential Equations 8 (1992), no. 1, 122-128.
-
(1992)
Ann. Differential Equations
, vol.8
, Issue.1
, pp. 122-128
-
-
Pingguang, Z.1
Li, W.2
-
9
-
-
84971690176
-
Quadratic systems with a weak focus
-
Zhang Pingguang and Cai Suilin, Quadratic systems with a weak focus, Bull. Austral. Math. Soc. 44 (1991), no. 3, 511-526.
-
(1991)
Bull. Austral. Math. Soc
, vol.44
, Issue.3
, pp. 511-526
-
-
Pingguang, Z.1
Suilin, C.2
-
10
-
-
84978966758
-
Quadratic systems with a weak focus and a strong focus
-
Zhang Pingguang, Quadratic systems with a weak focus and a strong focus, Appl. Math. J. Chinese Univ. 14B (1999), no. 1, 7-14.
-
(1999)
Appl. Math. J. Chinese Univ
, vol.14 B
, Issue.1
, pp. 7-14
-
-
Pingguang, Z.1
-
11
-
-
4744345779
-
On number of limit cycle surrounding strong focus for a quadratic systems with a weak focus and a strong focus
-
Zhang Pingguang and Zhao Shenqi, On number of limit cycle surrounding strong focus for a quadratic systems with a weak focus and a strong focus, Appl. Math. J. Chinese Univ. 16B (2001), no. 2, 127-132.
-
(2001)
Appl. Math. J. Chinese Univ
, vol.16 B
, Issue.2
, pp. 127-132
-
-
Pingguang, Z.1
Shenqi, Z.2
-
12
-
-
0012821332
-
Non-existence LCs around a fine focus of order 3 of quadratic systems
-
Li Chengzhi, Non-existence LCs around a fine focus of order 3 of quadratic systems, Chin. Ann. of Math. 7B (1986), no.2, 174-190.
-
(1986)
Chin. Ann. of Math
, vol.7 B
, Issue.2
, pp. 174-190
-
-
Li, C.1
-
13
-
-
84979056549
-
Uniqueness of the limit cycle around a second-order weak focus for quadratic systems, (in Chinese)
-
Zhang Pingguang, Uniqueness of the limit cycle around a second-order weak focus for quadratic systems, (in Chinese) Acta Math. Sinica 42 (1999), no. 2, 289-304.
-
(1999)
Acta Math. Sinica
, vol.42
, Issue.2
, pp. 289-304
-
-
Pingguang, Z.1
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