Nash refers to a research area in mathematics and economics that focuses on game theory and strategic decision-making. Named after mathematician John Nash, this field explores how individuals or entities can make optimal decisions when interacting with others who also have their own best interests in mind. The central concept in Nash research is the Nash equilibrium, which is a stable state where no player can improve their outcome by unilaterally changing their strategy. Researchers in this area study various types of games, such as cooperative and non-cooperative games, to understand the dynamics of decision-making and how players can reach mutually beneficial outcomes. Overall, Nash research has implications for a wide range of fields, including economics, political science, and evolutionary biology.