Data and code for "Loss of positive definiteness as numerical relaxation inhigh-Weissenberg-number computations"

This archive provides the processed tables, selected raw numerical records,symbolic and numerical verification scripts, and final figures supportingthe manuscript “Loss of positive definiteness as numerical relaxation inhigh-Weissenberg-number computations”. It covers the frozen-state thresholdand short-wave response, grid and stress-diffusion sensitivity ofnegative-eigenvalue regions, determinant-budget reconstruction, and recordedintervention/event comparisons. The intervention evidence establishesimplementation sensitivity and does not assign numerical termination to aunique discrete operator.