duality theory的用法和樣例：
例句
- There is also a comprehensive treatment of optimality conditions, Lagrange multiplier theory, and duality theory.
這門課程也包括了對最適化條件，拉格朗日乘數理論，和對偶理論的綜合論述。 - This paper studies the saddle point and duality theory of set-valued optimization problems in the sense of strict efficiency.
摘要本文研究集值優化問題在嚴有效意義下的鞍點理論及對偶理論。
