By S. Busenberg, M. Martelli
ISBN-10: 0387541209
ISBN-13: 9780387541204
The assembly explored present instructions of study in hold up differential equations and similar dynamical platforms and celebrated the contributions of Kenneth Cooke to this box at the get together of his sixty fifth birthday. the amount comprises 3 survey papers reviewing 3 parts of present learn and seventeen study contributions. The examine articles take care of qualitative houses of recommendations of hold up differential equations and with bifurcation difficulties for such equations and different dynamical platforms. A better half quantity within the biomathematics sequence (LN in Biomathematics, Vol. 22) includes contributions on fresh tendencies in inhabitants and mathematical biology.
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Extra resources for Delay Differential Equations and Dynamical Systems: Proceedings of a Conference Held in Claremont, California, Jan. 13-16, 1990
Sample text
Monats. Math. 98, 267-275 31. , Law, R. (1985): Permanent coexistence in general models of three interacting species. J. Math. Biol. 21,285-298 32. , Moran, W. (1982): Persistence of species obeying difference equations. J. Math. Bio. 15, 203-213 33. : Permanence in dynamical systems. Preprint 34. T. (1983): A criterion for permanent coexistence of species with an apllication to a two-prey one-predator system. Math. Biosc. 63,253-269 40 Paul Waltman 35. Jansen, W. Volterra systems. J. Math. Biol.
K. (1980): Dynamic behavior from the bifurcation function. T6hoku Math. J. 32, 577-592 11. K. (1979): Nonlinear oscillations in equations with delays. Lect. Appl. Math. 17, 157-185. Am. Math. Soc. 12. K. (1985): Flows on centre manifolds for scalar functional differential equations. Proc. Royal Soc. Edinburgh 1OlA, 193-201 30 Jack K. Hale 13. K. (1986): Local flows for functional differential equations. Contemporary Mathematics 56, 185-192. Am. Math. Soc. 14. Huang, W. (1990): Global geometry of the stable regions for two delay differential equations.
III) x~ < b, Yx < O. Proceeding as in ease (I) one gets, for 0 < x < xl, • P~(x) - rl2(x , b, u1(•), •) > - M - '/]2(Xl, b, Ill(C), •) Since : > - M - Yl > - M - '121(~). (~,~,) po( e(t, yl, •))dr = • fo b rll (x, b, sl(•), po(x)dx e) - •Pc(x) + •I(b, ul(•), •) j~b po(x)dx a cPe(x)-~-~,~Ul(•),e) Thus, again, k(za, yl, e) > a. This completes the proof of (ii). >-log 1. cr [] Remark 2. Lemmas 3 and 4 hold, with obvious modifications, for system (9) with • < 0. Indeed, it suffices to replace the polynomial Pe by - P c and to define the first integral We accordingly.
Delay Differential Equations and Dynamical Systems: Proceedings of a Conference Held in Claremont, California, Jan. 13-16, 1990 by S. Busenberg, M. Martelli
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