periodic solutions and stability analysis for neural networks with time-varying delay
fang hui (dept. of math.; kunming university of science and technology; kunming 650051)

..............page:318-328

stability of delay difference equations in banach spaces
cheng sui sun (dept. of math.; tsing hua university; hsinchu; 30043; chinese taiwan) michael i. gil (dept. of math.; ben gurion university; p.o. box 653; berr sheva; 84105; israel)

..............page:307-317

a sufficient and necessary condition of the existence to a double bun type separatrix cycle for axial symmetry cubic system
shen boqian & shen jie (dept. of math.; liaoning normal university; dalian 116029)

..............page:336-342

boundary value problems with integro condition for retarded functional differential equations
lu shiping (dept. of math.; anhui normal university; wuhu 241000)

..............page:329-335

annals of differential equations contents of volume 17

..............page:409-411

boundedness of infinite delay difference systems in terms of two measures
zhang shunian & fu xianlong (dept. of applied math.; shanghai jiaotong university; shanghai 200030)

..............page:391-399

classification of the phase portrait for planar z_8-equivariant hamiltonian system of degree 7
yang lijun ; liu zhengrong; wu xiaoming (dept. of math.; zhongshan university; guangzhou 510275 dept. of math.; yunnan university; kunming 650091)

..............page:385-390

periodic solutions of planar systems with four delays
zhang zhengqiu & wang zhicheng (dept. of applied math.; hunan university; changsha 410082)

..............page:400-408

existence and global attractivity of positive periodic solution of a logistic growth system with feedback control and deviating arguments
yang fan (dept. of math.; tonghua teachers college; tonghua 134002) jiang daqing (dept. of math.; northeast normal university; changchun 130024)

..............page:377-384

the solutions of forced pendulums equation with small damping
shi biao (dept. of math.; changzhou teachers college of technology; changzhou 213015)

..............page:343-351

centers of some cubic systems
valery g. romanovski (center for applied math. and theoretical physics; university of maribor; krekova 2; si-2000 maribor; slovenia) and (belarusian state university of informatics & radioelectronics; p.brovka 6 minsk 220027 belarus) alexandru ub (dep

..............page:363-376

uniqueness and distribution of limit cycles for bounded quadratic system
song yu (dept. of math. and computering & engineering; ningxia university; yinchuan 750021)

..............page:352-362