Bodhisattva Sen coauthored improved risk bounds for isotonic regression with Sabyasachi Chatterjee and Adityanand Guntuboyina. Their analysis shows that the least-squares estimator adapts to the number of constant pieces of a monotone signal. The work also provides local minimax lower bounds, helping distinguish an estimator's limitations from limitations inherent in the data.[ref]
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Bodhisattva Sen, also known as Bodhisattva Senapati, is an important figure in the context of Buddhist history and philosophy, particularly within East Asian Buddhism. The term "Bodhisattva" refers to an enlightened being who, motivated by compassion, seeks to attain Buddhahood for the benefit of all sentient beings, rather than just for themselves.