TY  - JOUR
ID  - Liu2011
LB  - Liu2011
AU  - Liu, Xinggui
AU  - Ren, Yaping
AU  - Li, Yongkun
TI  - Four positive periodic solutions of a discrete time Lotka-Volterra competitive system with harvesting terms
ST  - Four positive periodic solutions of a discrete time Lotka-Volterra competitive system with harvesting terms
JO  - Opuscula Math.
JA  - Opuscula Math.
JF  - Opuscula Mathematica
PY  - 2011
VL  - 31
IS  - 2
SP  - 257
EP  - 267
DO  - http://dx.doi.org/10.7494/OpMath.2011.31.2.257
UR  - http://dx.doi.org/10.7494/OpMath.2011.31.2.257
AB  - In this paper, by using Mawhin's continuation theorem of coincidence degree theory, we establish the existence of at least four positive periodic solutions for a discrete time Lotka-Volterra competitive system with harvesting terms. An example is given to illustrate the effectiveness of our results.
KW  - discrete systems
KW  - Lotka-Volterra competitive models
KW  - coincidence degree
KW  - harvesting terms
SN  - 1232-9274
ER  -