eprintid: 14368 rev_number: 12 eprint_status: archive userid: 353 dir: disk0/00/01/43/68 datestamp: 2017-02-03 12:07:32 lastmod: 2021-08-27 17:28:32 status_changed: 2017-02-03 12:07:32 type: article metadata_visibility: show creators_name: Rinaldi, S. creators_name: Della Rossa, F. creators_id: 7286 title: Conflicts among N armed groups: Scenarios from a new descriptive model ispublished: pub divisions: prog_eep keywords: mathematical modeling; social systems; conflicts; terrorism; bifurcations; chaos abstract: In this paper we propose and analyze a new descriptive model of armed conflicts among N groups. The model is composed of N2 ordinary differential equations, with 3(N2+N) constant parameters that describe military characteristics and recruitment policies, ranging from pure defensivism to pure fanaticism. The results are only preliminary, but point out interesting (though not very surprising) properties: periodic coexistence is possible, and multiple attractors can exist; governmental groups cannot go extinct if they are highly defensivist, and rebels cannot be eradicated if they are highly fanatic. Shocks due to interventions of short duration of an external army can stabilize/destabilize the system and/or eradicate some group, and the same holds true for small structural changes. Other more subtle questions concerning, for example, the existence of chaotic regimes and the systematic evaluation of the role of strategic factors like power, intelligence, and fanaticism, remain open and require further research. date: 2018-04 date_type: published publisher: Springer-Verlag id_number: 10.1007/s11071-017-3446-9 creators_browse_id: 253 full_text_status: public publication: Nonlinear Dynamics volume: 92 number: 1 pagerange: 3-12 refereed: FALSE issn: 0924-090X coversheets_dirty: FALSE fp7_project: no fp7_type: info:eu-repo/semantics/article citation: Rinaldi, S. & Della Rossa, F. (2018). Conflicts among N armed groups: Scenarios from a new descriptive model. Nonlinear Dynamics 92 (1) 3-12. 10.1007/s11071-017-3446-9 . document_url: https://pure.iiasa.ac.at/id/eprint/14368/1/nonlinear.pdf