1. BLUFFING CAN BE REWARDING IN LOVE AFFAIRS: The lesson of Cyrano de Bergerac Sergio Rinaldi DEI, Politecnico di Milano, Milano, Italy EEP, IIASA, Laxenburg, Austria

2. OUTLINE PREMISE ON MODELS MULTIPLE ATTRACTORS WHAT ABOUT LOVE AFFAIRS? CYRANO DE BERGERAC EXTENSIONS AND CONCLUSIONS

3. PREMISE ON MODELS Can we graphically describe the evolution of a love story? time 0 0 0 0 0 0

4. PREMISE ON MODELS From individuals to couples time 0 0 0

5. PREMISE ON MODELS Typical love stories 000000

6. PREMISE ON MODELS 1: SHE 2: HE t: today t+1: tomorrow Similarly for HE

7. Gone with the Wind (1936) – Margaret Mitchell (1900-1949) Gone with the Wind (1939) - Victor Fleming Vivien Leigh Clark Gable Scarlett O'Hara Rhett Butler

8. Gone with the Wind (1936) – Margaret Mitchell (1900-1949)

9. Il Canzoniere (1366) – Francesco Petrarca (1304-1374) Laura de SadeFrancesco Petrarca Time [years] Francescos love 0 5 10 15 20 1.5 1 0.5 0 -0.5

10. Jules et Jim (1953) – Henri-Pierre Roché (1879-1959) Jules et Jim (1962) - François Truffaut Kathe Jules Jim Oskar WernerJeanne MoreauHenri Serre

11. Jules et Jim (1953) – Henri-Pierre Roché (1879-1959)

12. La belle et la bête (1740) Jeanne-Marie Leprince de Beaumont (1711-1780) Beauty and the Beast (1991) - Walt Disney

13. Pride and Prejudice (1813) – Jane Austen (1775-1817) Pride & Prejudice (2005) - Joe Wright Keira Knightley Matthew Macfadyen Elizabeth BennetFitzwilliam Darcy

14. A Cyr = - 2A Rox = 0.6A Chr = 1 Cyrano de Bergerac – Edmond Rostand (1868-1918) Cyrano de Bergerac (1990) - Jean-Paul Rappeneau Gérard DepardieuAnne BrochetVincent Perez Cyrano de BergeracRoxaneChristian de Neuvillette

15. MULTIPLE ATTRACTORS a simple experiment

16. MULTIPLE ATTRACTORS

18. anaerobic bacteria aerobic bacteria two equilibria HEALTHY SICK

19. MULTIPLE ATTRACTORS NORMALHICCUP one equilibrium and one cycle

20. MULTIPLE ATTRACTORS two strange attractors EPYLESSY NORMAL

21. MULTIPLE ATTRACTORS From bad to good BAD GOOD ???

22. WHAT ABOUT LOVE AFFAIRS? BAD GOOD

23. WHAT ABOUT LOVE AFFAIRS? BAD GOOD

24. WHAT ABOUT LOVE AFFAIRS? GOOD BAD GOOD NO BLUFFWITH BLUFF

25. CYRANO DE BERGERAC

30. Fifteen years later

31. CYRANO DE BERGERAC

32. CYRANO DE BERGERAC The model Cyrano Roxane

33. CYRANO DE BERGERAC The model The parameters

34. Virtual phase: without bluffing 0 BAD GOOD

35. Real phase: with bluffing 0

36. Separation phase 0

37. Virtual phase: the expected future 0 BAD GOOD

38. Summary: The overall story 0 BAD GOOD

39. EXTENSIONS AND CONCLUSIONS

41. high no bluffing intermediate temporary bluffing low permanent bluffing These results explain the incresing use of chatting and aesthetic surgery Appeals: