The discussion revolves around the interpretation of a mathematical notation involving parentheses and the variable "n." Participants clarify that the notation refers to the binomial coefficient, specifically "n choose 2," which represents the number of ways to choose 2 items from a set of n items. The original poster expresses gratitude for the clarification. The conversation highlights the importance of understanding mathematical symbols in combinatorics. Overall, the exchange emphasizes the significance of clear communication in discussing mathematical concepts.