色情电影

时间：2026年11月4日14:00-15:30(周三)

地点：明德主楼734

主讲人：曹志刚 北京交通大学色情电影管理色情电影 教授

主持人：祝坤福教授

题目：Hilbert Elasticity

讲座简介：

By treating positive vectors as rays and using Hilbert's projective metric to measure their distance, we introduce the Hilbert elasticity, which generalizes the Hicks elasticity of substitution from two to arbitrary number of inputs, in a global way that is distinct from known ones.  Using oscillation semi-norm and Dobrushin coefficient, we provide simple characterization and closed-form formulas forcomputing the Hilbert elasticity. Applying the contraction mapping theory on the Hilbert metric, we find that the Hilbert elasticity is powerful in proving  up-to-scale uniqueness of fixed points, global convergence, and comparative statics. Using this framework, we obtain new results for the CES exchange economy in general equilibrium and gravity models in international trade.

个人简介：

曹志刚，北京交通大学色情电影管理色情电影 教授。长期从事合作博弈、交通博弈、网络博弈和算法博弈等方面的研究。近期主要研究兴趣是策略弹性。在包括Operations Research, Mathematics of Operations Research, Games and Economic Behavior《中国科学：数学》和《色情电影学季刊》在内的期刊上发表多篇论文。相关成果曾获中国信息色情电影学理论贡献奖、系统科学与系统工程青年科技奖和第九届高等学校科学研究优秀成果奖（人文社会科学）二等奖等荣誉。