dwsmith said:All points $(x,y)$ such that $x^2 - y^2 < 1$.
This set is open but I am not sure about the accumulation points.
R^2 accumulation is a statistical measure used to evaluate the fit of a model to a set of data. It represents the proportion of the variation in the dependent variable that is explained by the independent variable(s). A higher R^2 value indicates a better fit of the model to the data.
An R^2 value of 0 represents no relationship between the independent and dependent variables. This means that the model does not explain any of the variation in the dependent variable and is not a good fit for the data.
Open R^2 accumulation refers to the accumulation of R^2 values from individual studies or experiments conducted by different researchers. Closed R^2 accumulation, on the other hand, refers to the accumulation of R^2 values from a single study or experiment that is repeated multiple times with different samples or conditions.
R^2 accumulation allows for a more comprehensive evaluation of the relationship between variables. It takes into account the consistency and generalizability of the results across multiple studies or experiments, providing a more accurate understanding of the overall effect or impact of the independent variable(s) on the dependent variable.
R^2 accumulation can be used to determine the strength and significance of relationships between variables, to compare the effectiveness of different models in explaining a phenomenon, and to identify potential moderators or factors that may influence the relationship between variables. It can also be used to guide future research and inform decision-making in various fields such as psychology, economics, and social sciences.