Inverted U

Inverted U may refer to:

• Calmfors–Driffill hypothesis, an economic theory describing the relationship between collective bargaining and employment
• Kuznets curve, an economic theory describing the relationship between income per capita and wealth inequity
• Yerkes–Dodson law, a concept in psychology, describing the relationship between arousal and performance
• ∩ (U+2229 in Unicode); also ${\displaystyle \cap }$, the mathematical symbol for Intersection (set theory)
• A shape used to describe narrative structure, specifically the shape for a tragedy

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