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 cumulative reward


Combinatorial Multi-Armed Bandit with General Reward Functions

Neural Information Processing Systems

In this paper, we study the stochastic combinatorial multi-armed bandit (CMAB) framework that allows a general nonlinear reward function, whose expected value may not depend only on the means of the input random variables but possibly on the entire distributions of these variables. Our framework enables a much larger class of reward functions such as the max() function and nonlinear utility functions. Existing techniques relying on accurate estimations of the means of random variables, such as the upper confidence bound (UCB) technique, do not work directly on these functions. We propose a new algorithm called stochastically dominant confidence bound (SDCB), which estimates the distributions of underlying random variables and their stochastically dominant confidence bounds. We prove that SDCB can achieve O(log T) distribution-dependent regret and O( T) distribution-independent regret, where T is the time horizon. We apply our results to the K-MAX problem and expected utility maximization problems. In particular, for K-MAX, we provide the first polynomial-time approximation scheme (PTAS) for its offline problem, and give the first O( T) bound on the (1)-approximation regret of its online problem, for any > 0.



Appendix A Implementation Details

Neural Information Processing Systems

A.1 More Information About The Continuous Environment We provide a detailed description of the continuous environments with constrained settings: Let's consider an optimization problem in the form of: minimize ฮฑ After analyzing Table C.1 and Figure C.1, it is evident that the B2CL, MEICRL, and InfoGAIL-ICRL Although MMICRL-LD shows a notable improvement, its performance remains mediocre in environments involving three types of agents. Table C.2 presents the mean std results of all algorithms in Mujoco. Figure C.2 depicts the distribution of x-coordinate values Half-Cheetah, Blocked Swimmer, and Blocked Walker environments. It demonstrates the algorithm's capacity to infer and restore incorrect We employ "/" to separate the results for various We present the mean std results calculated over 20 runs for each random seed.Method Setting 1 Setting 2 Setting 3 Setting 4 Feasible Cumulative Rewards B2CL 0.24 0 .40 Figure C.1: The feasible cumulative rewards (left two columns of the first three rows and second-to-last row) and constraint violation rate (right two columns of the first three rows and last row). The first row showcases the expert demonstration, followed by the results of B2CL, MEICRL, InfoGAIL-ICRL, MMICRL-LD, and MMICRL algorithms.




No-regret Algorithms for Fair Resource Allocation

Neural Information Processing Systems

Suppose a revenue-maximizing recommendation algorithm concludes from past data that more revenue is generated by showing the ad to Group A compared to Group B. In that case, the ad-serving algorithm will eventually end up showing that ad exclusively to Group A