Before revision:  By introducing algorithmic stability theory to pairwise differential privacy, our theoretical analysis does   not require convex pairwise loss functions, which means that our method is general to both convex and non-convex conditions.
After revision:  By introducing algorithmic stability theory to pairwise differential privacy, our theoretical analysis does pairwise locally elastic stability not require convex pairwise loss functions, which means that our method is general to both convex and non-convex conditions.