BLUFFING CAN BE REWARDING IN LOVE AFFAIRS:

The lesson of Cyrano de Bergerac

Sergio RinaldiDEI, Politecnico di Milano, Milano, Italy

EEP, IIASA, Laxenburg, Austria

OUTLINE

• PREMISE ON MODELS

• MULTIPLE ATTRACTORS

• WHAT ABOUT LOVE AFFAIRS?

• CYRANO DE BERGERAC

• EXTENSIONS AND CONCLUSIONS

PREMISE ON MODELSCan we graphically describe the evolution of a love story?

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PREMISE ON MODELS From individuals to couples

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PREMISE ON MODELS Typical love stories

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PREMISE ON MODELS

SHE

1: SHE2: HE

t: todayt+1: tomorrow

𝑥1(𝑡 )−𝛼1𝑥1(𝑡)+ρ1𝐴2+𝑅1(𝑥2(𝑡))𝑅1(𝑥2)

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Similarly for HE

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

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

Il Canzoniere (1366) – Francesco Petrarca (1304-1374)

Laura de Sade Francesco Petrarca

Time [years]Fran

cesc

o’s

love

0 5 10 15 20

1.5

1

0.5

0

-0.5

-1

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

Jules et Jim (1962) - François Truffaut

KatheJules Jim

Oskar Werner Jeanne Moreau Henri Serre

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

La belle et la bête (1740)Jeanne-Marie Leprince de Beaumont (1711-1780)

Beauty and the Beast (1991) - Walt Disney

Pride and Prejudice (1813) – Jane Austen (1775-1817)

Pride & Prejudice (2005) - Joe Wright

Keira Knightley Matthew Macfadyen

Elizabeth Bennet Fitzwilliam Darcy

ACyr = - 2 ARox = 0.6 AChr = 1

Cyrano de Bergerac – Edmond Rostand (1868-1918)

Cyrano de Bergerac (1990) - Jean-Paul Rappeneau

Gérard Depardieu Anne Brochet Vincent Perez

Cyrano de Bergerac Roxane Christian de Neuvillette

MULTIPLE ATTRACTORS

a simple experiment

MULTIPLE ATTRACTORS

MULTIPLE ATTRACTORS

MULTIPLE ATTRACTORS

anae

robi

c ba

cter

ia

aerobic bacteria

two equilibria

HEALTHY

SICK

MULTIPLE ATTRACTORS

NORMAL HICCUP

one equilibrium and one cycle

MULTIPLE ATTRACTORStwo strange attractors

EPYLESSYNORMAL

MULTIPLE ATTRACTORSFrom bad to good

BAD

GOOD

???

WHAT ABOUT LOVE AFFAIRS?

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GOOD

WHAT ABOUT LOVE AFFAIRS?

IDEA: Bluff

– Love – Appeal 𝑥1

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BAD

GOOD

WHAT ABOUT LOVE AFFAIRS?

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GOOD

𝑥1

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BAD

GOOD

NO BLUFF WITH BLUFF

CYRANO DE BERGERAC

CYRANO DE BERGERAC

CYRANO DE BERGERAC

CYRANO DE BERGERAC

CYRANO DE BERGERAC

Fifteen years later

CYRANO DE BERGERAC

CYRANO DE BERGERACThe model

SHEHE

Cyrano

Roxane

CYRANO DE BERGERACThe model

SHEHE

The parameters

Virtual phase: without bluffing

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GOOD

Real phase: with bluffing

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Separation phase

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Virtual phase: the expected future

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Summary: The overall story

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EXTENSIONS AND CONCLUSIONS

EXTENSIONS AND CONCLUSIONS

EXTENSIONS AND CONCLUSIONS

• high no bluffing• intermediate temporary bluffing• low permanent bluffing

These results explain the incresing use of chatting and aesthetic surgery

Appeals: